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FATIGUE STUDY
The Elimination of Humanity's Greatest Unnecessary Waste
A FIRST STEP IN MOTION STUDY
BY FRANK B. GILBRETH
Member of American Society of Mechanical Engineers
AND
LILLIAN M. GILBRETH, PH. D.
Hew H?orft
STURGIS & WALTON
COMPANY
1916
All rights reserved
Copyright, 191C BY STURGIS & WALTON COMPANY
Set up and electrotyped. Published February, 1916.
PREFACE
In the final analysis, that organization is best that has the best quality of workers. No or- ganization can continue to be of first quality whose workers are over-fatigued. Other things being equal, that country will be most happy and most successful whose workers have the least un- necessary fatigue.
Aside from the pleasure one may obtain from it, it is the duty of every one to eliminate the causes of unnecessary fatigue, and to promote the dissemination of knowledge of how to recover most quickly from unnecessary and necessary fa- tigue.
Fatigue study rests on scientific investigation that requires the special training of an expert, and laboratory methods and equipment; but there are elementary methods of studying and eliminating fatigue that are not only so simple that any one can understand and apply them, but that are also a definite stage in the preparation of the fatigue study expert.
350383
PREFACE
It is the aim of this book to outline both these preliminary methods and the scientific methods of fatigue elimination and to put the available material for fatigue study into such shape that any one interested may make immediate, definite, and profitable use of it.
CONTENTS
CHAPTER I
A DESCRIPTION AND GENERAL OUTLINE OF FATIGUE STUDY : WHAT MUST BE DONE
PAGE
FATIGUE STUDY AND WASTE 3
WHAT FATIGUE Is 4
WHAT FATIGUE STUDY Is 7
THE FIELD OF THIS BOOK 7
THE RELATION OF FATIGUE STUDY TO MEASUBED FUNC- TIONAL MANAGEMENT 9
RELATION OF FATIGUE STUDY TO MOTION STUDY ... 11
THE CLASSES OF FATIGUE 13
THE PROBLEMS OF FATIGUE STUDY 14
THE METHODS OF FATIGUE STUDY 14
EMPHASIS IN FATIGUE STUDY 15
A WORK FOB EVEBY ONE . . 16
CHAPTER II THE FATIGUE SURVEY: WHAT IS TO BE DONE
WHAT A SUBVEY Is 18
THE GENEBAL SUBVEY AND THE FATIGUE SUBVEY . . 19
THE AIMS OF THE FATIGUE SUBVEY 19
THE TIME AND PLACE OF MAKING THE SUBVEY ... 20
THE QUALIFICATION OF THE SUBVEY MAKES .... 22
WHAT TO LOOK FOB 25
VABIABLES THAT AFFECT FATIGUE 29
THE SUBVEY RECOBD SHEET 30
SUBVEY PHOTOGBAPHS 31
MAKING THE SUBVEY SEBVICEABLE 32
CHAPTER III
PRELIMINARY PROVISIONS FOR REST FOR OVER- COMING FATIGUE: WHAT CAN BE DONE NOW
PROVISION FOB REST 38
CONTENTS
PAGE
CHAIRS TO MAKE THE REST MOST EFFECTIVE .... 42
BETTERMENT WORK 47
RESULTS 49
CHAPTER IV
HOME READING BOX MOVEMENT: A PRAC- TICAL ILLUSTRATION
WHAT IT Is 54
THE Box IN THE PLANT 55
THE PLANT AS A SOURCE OF SUPPLY 55
THE HOME ELEMENT 58
ROUTING THE MAGAZINES 61
THE PROBLEM OF MAINTENANCE 63
How THE CONDITIONS VARY 67
THE HOME READING Box AND FATIGUE 69
THE BY-PRODUCTS OF THE HOME READING Box MOVE- MENT 70
How TO BEGIN . 75
CHAPTER V
PRELIMINARY FATIGUE ELIMINATION: WHAT CAN BE DONE NOW
THE LIGHTING PROBLEM 77
THE HEATING, COOLING, AND VENTILATING PROBLEM . . 82
FIRE PROTECTION 84
SAFETY PROTECTION 85
THE WORK PLACE 88
THE WORK-BENCH OR TABLE 90
THE CHAIR OR OTHER FATIGUE-ELIMINATING DEVICE . . 91
PLACING THE MATERIAL WORKED ON 93
THE PLACING OF TOOLS AND DEVICES 94
THE CLOTHING OF THE WORKER 95
CHAPTER VI THE FATIGUE MUSEUM : AN OBJECT LESSON
WHAT A FATIGUE MUSEUM Is 99
THE PARENT FATIGUE MUSEUM 100
WHAT THE FATIGUE MUSEUM CONTAINS 102
WHAT THE MUSEUM DOES NOT CONTAIN 102
CONTENTS
PAGE
TYPES OF CHAIRS AND THEIR USES 104
OTHEB FATIGUE ELIMINATING DEVICES 108
How TO USE THE DEVICES 109
STARTING YOUR OWN FATIGUE MUSEUM Ill
CHAPTER VII
x FATIGUE MEASUREMENT : HOW TO ATTACK THE PROBLEM SCIENTIFICALLY
HISTORY OF FATIGUE MEASUREMENT 114
FATIGUE, A TEST OF EFFICIENT ACTIVITY 116
THE ACTIVITY U/
MOTION STUDY, MICROMOTION STUDY, THE CYCLEGRAPH, AND THE CHRONOCYCLEGRAPH METHOD AS MEASURES
OF ACTIVITY 118
TESTING THE WORK BY MOTIONS REQUIRED 123
TESTING WORKERS BY MOTION CAPABILITIES .... 124 THE USE OF ACTIVITY RECORDS AS DATA FOR ELIMINAT- ING FATIGUE .... 124
THE TIME ELEMENT 125
THE STANDARDIZATION OF WORK AND REST .... 127
CHAPTER VIII
MAKING ADJUSTMENTS: HOW PRESENT PRAC- TICE IS DEVELOPED INTO STANDARD PRAC- TICE
A CONCRETE EXAMPLE OF MAKING ADJUSTMENTS . . .132
FORMER METHOD OF ASSEMBLY 133
How THE NEW PRACTICE WAS DERIVED 134
THE Two FACTORS TO BE CONSIDERED 134
OUTLINE OF THE CHANGES TO BE MADE 135
THE SOLUTION OF THE PROBLEM 135
FINAL ADJUSTMENT 139
CHANGES IN TYPE OF WORK DEMANDED 140
CHANGE IN MENTAL ATTITUDE 140
VALUE OF THIS EXAMPLE 140
CHAPTER IX
THE OUTCOME: HOW FAR HAVE WE AT- TAINED OUR AIM? THE TESTS OF GENERAL HEALTH 142
CONTENTS
PAGE
THE TEST OF PROLONGED ACTIVITY 143
THE TEST OF POSTURE 144
THE TEST OF BEHAVIOUR AND IMPLIED MENTAL ATTITUDE. 146
THE TEST OF TRANSFERENCE OF SKILL 148
TEST OF " HAPPINESS MINUTES," INDIVIDUAL AND SOCIAL 149
CHAPTER X THE FUTURE: WHAT EACH ONE OF US CAN DO
THE WORK OF THE COLLEGES 153
THE WORK OF THE MANAGER 155
THE WORK OF THE WORKER 156
THE WORK OF THE PUBLIC ... 157
FATIGUE STUDY
FATIGUE STUDY
CHAPTER I
A DESCRIPTION AND GENERAL OUTLINE OF FATIGUE STUDY: WHAT MUST BE DONE
Fatigue Study and Waste.
In "Motion Study" we stated: "There is no waste of any kind in the world that equals the waste from needless, ill-directed, and inef- fective motions." * It is an aspect of wasted motions that we are discussing here. Wasted motions mean wasted effort and wasted time. One of the results of this waste is unnecessary .fatigue, caused by unnecessary effort expended during time that must, as a result, be wasted. Time, a lifetime, is our principal inheritance. To waste any of it is to lose part of our principal asset. To waste time and to suffer from un- necessary fatigue simultaneously can be excused
i See " Motion Study," p. 2. 3
4 FATIGUE STUDY
only by ignorance. Unnecessary fatigue is caused by some one's ignorance. This book aims to call the attention of the world to the relation- ship between fatigue and waste, with the hope that the knowledge of our methods of fatigue elimination may be useful to others.
What Fatigue Is.
A crowd of workers come out of the factory after the day's work. Some rush home; others walk at a leisurely pace. Some move slowly and with effort. Some have their heads back and a satisfied expression on their faces. Others have their heads bent forward, and look as though life were not worth while. What is the differ- ence between the members of this group? Mainly a matter of fatigue. Fatigue is the after-effect of work. It is the condition of the worker's organism after he has expended energy in doing something. It is a necessary by-prod- uct of activity. If, as is presumable, every mem- ber of our crowd of workers has been putting in a day full of activity, we might expect to see the same marks of fatigue on every face and figure, — but we do not.
DESCRIPTION AND GENERAL OUTLINE 5
What, then, are the reasons for the difference? The state of fatigue has only been systematically studied during the past thirty years. Even to- day it is not wholly understood. We do know, however, several things about it, that may ex- plain what we see in the emerging group. We know that fatigue is marked by a decrease in power to work, a decrease in pleasure taken in work, and a decrease in the enjoyment of the hours spent away from work. We know that exertion not only uses up temporarily the energy of the body, but that it also seems to generate a sort of poison which " slows one down " for the time being. In the third place, we know, also, that the effects of fatigue are more difficult to overcome as the fatigue becomes greater. Care- ful observation and records show that a little fatigue is easily overcome if proper rest is sup- plied immediately. Twice the amount of fatigue requires more than twice the amount of rest. Four times the amount of fatigue demands much more than twice as much rest as the preceding "more than twice the amount of rest," until, finally, a state of excessive fatigue requires a rest period that might have to be prolonged in-
6 FATIGUE STUDY
definitely. It is this fact that lies at the basis of the great unnecessary waste in accumulated fa- tigue.
The trouble with these tired workers, then, is that their work has not been arranged in the least fatiguing manner nor in such a way that they could get the most rest and recovery in the least amount of idle time during the working hours. The ones whose heads are high and whose shoulders are thrown back may have been pro- vided in some way with sufficient rest. The ones whose heads are bowed probably have not had the recovery time that they needed. It is pos- sible that those who have had all the rest they needed have not produced as much as have the others. The remedy for this may not lie in short- ening the rest, but in improving work methods. The waste in work not done, or in work done with the wrong method, is a serious economic waste. The waste in unnecessary fatigue is not only an economic waste, it is a waste of life, and it calls for immediate attention from every one of us, whether interested in the individual, the group, or the economic prosperity of our country.
DESCRIPTION AND GENERAL OUTLINE 7
What Fatigue Study Is.
Our fatigiie study is an attack upon this un- necessary waste of human energy. It is a careful consideration of the problem of activity from the side of its results upon the human organism. It aims :
1. To determine accurately what fatigue re-
sults from doing various types of work.
2. To eliminate all unnecessary fatigue.
3. To reduce the necessary fatigue to the
lowest amount possible.
4. To provide all possible means for over-
coming fatigue.
5. To put the facts obtained from the study
into such form that every worker can use them for himself to get more out of life.
The Field of This Book.
The reader who will carefully watch the tired crowd of workers will probably decide that he would like to do something about the fatigue problem immediately. There are various meth- ods by which he may attack the problem. He may, and must, ultimately, review the literature
S FATIGUE STUDY
on fatigue. The work of Marey, of Amar, of Im- bert, of Offner, of Thorndike, and of numerous other physiologists and psychologists lies open to the student of the subject. He may turn im- mediately to Miss Josephine Goldmark's mas- terly volume on " Fatigue and Efficiency." This will give him an insight into the application of fatigue elimination to the industries. He may decide, however, that such study must wait, and that he must actually do something to cut down the fatigue the first thing the next morning, while the driving force of what he has seen is still strong. Nothing can mean so much to what he is to do as the strong incentive that drives him to doing it, the desire to help. But he will do best if he is instructed and directed. He should plan, in order that he may do the most in the least amount of time, and do the big, easy, ob- vious things first.
This book will outline a method of attack, and furnish a working practice for attacking the fa- tigue problem in an industrial plant. This prac- tice is recommended because it rests on the re- sults of measurement. We have here not simply a collection of illustrations that show what has
DESCRIPTION AND GENERAL OUTLINE 9
been done in eliminating fatigue in the indus- tries. All fatigue elimination is to be com- mended, but illustrations that do not embody well-recognized principles are questionable mod- els. It is easy to make external changes that never touch the underlying cause of evil. Worth- while, permanent fatigue elimination goes at the fundamentals of the work itself, and studies these in relation to the fatigue. What has been done is worth while when we know^fepw it has been done, and ,jtby it has been done. Given these facts, we can determine how it may be done again in the same fashion and possibly even better. The practice that is the result of accurate meas- urement,— this is the standard to be demanded.
The Relation of Fatigue Study to Measured Functional Management.
Fatigue study is founded on measurement. This makes it an integral part of measured func- tional management. This is management that acts in accordance with standards. These stand- ards are derived by actually measuring accur- ately what is happening. Standards contain the results of the measurement combined into new
10 FATIGUE STUDY
working methods. These standards are main- tained only until they can be improved, when the new ones are in turn measured and main- tained. Such accurate measurement demands that the problem of management be divided into measurable units. These units are made as small as possible, and constantly smaller as time goes on. It was the great work of Doctor Tay- lor to divide an operation, that is, a piece of work to be measured, into units for timing with a stop watch, and to separate rest units from work units.
From its beginning, Scientific Management has recognized the importance of the part played by fatigue. This recognition helps to obtain that co-operation and permanent beneficial efficiency that are the underlying ideas and the maintain- ing forces in this type of management. But fa- tigue study has only recently been acknowledged as fundamental to the most efficient management. Any one can attack the fatigue problem in its present condition in the industries successfully. He has simply to apply measurement. He can do this without regarding the investigations and results of others, if he chooses, but he will pro-
DESCRIPTION AND GENERAL OUTLINE 11
gress faster and farther if he uses results already at hand, and improves on " the best that has been known and thought in the world."
Relation of Fatigue Study to Motion Study.
Motion study has been described as the divid- ing of the elements of the work into the most elementary subdivisions possible, studying and measuring the variables of these fundamental units separately and in relation to one another, and from these- studied, chosen units, after they have been derived, building up methods of least waste. It is through the measuring of motions that one comes to realize most strongly the neces- sity of fatigue study.
There has come, in the past twenty-five years, a strong general realization that the important factor in doing work is the human factor, or the human element. Improvement in working ap- paratus of any type is important in its effect upon the human being who is to use the appa- ratus. The moment one begins to make man, the worker, the centre of activity, he appreciates that he has two elements to measure. One is the ac- tivity itself. This includes the motions, seen or
12 FATIGUE STUDY
/
unseen, made by the worker, — what is done and how it is done. The other is the fatigue. This includes the length and nature of the interval or rest period required for the worker to recover his original condition of working power.
Any one who makes real motion study, or ana- lyzes motion study data, cannot fail to realize constantly the relationship of motion study to fatigue study. The fatigue is the more interest- ing element, in that it is the more difficult to determine exactly. When we recognize this close relationship between motion study and fatigue study, we see that we have a body of data al- ready collected and at our disposal. What is even more desirable, we have a method of meas- urement ready at our hand. Every observation of a motion may be used to give information about fatigue. Is this information of immedi- ate use to the man who is attacking his fatigue problem for the first time to-day? Yes, and no. Yes, in that it is at his disposal. No, in that he must determine his own particular problem be- fore he can start to solve it. The first step in this direction lies in classifying fatigue.
DESCRIPTION AND GENERAL OUTLINE 13
The Classes of Fatigue.
There are two classes of fatigue:
1. Unnecessary fatigue, which results from unnecessary effort, or work which does not need to be done at all. A typical ex- ample of such work is that of the brick- layer, who furnished one of the first sub- jects for motion study. Any one who has watched a bricklayer lift all of his body above the waist, together with the bricks and mortar from the level of his feet to the top of a wall, cannot fail to realize that bricklaying requires a great amount of energy as well as skill. Yet by far the most of the energy expended in the method of laying bricks, that had existed for centuries, was entirely unnecessary.1
2. Necessary fatigue, which results from work that must be done. The new method, which enabled this same brick- layer to lay three hundred and fifty bricks per hour, where he had laid one hundred and twenty bricks per hour before, did
i See " Bricklaying System," chapter xiv. Myron C. Clark Co., Chicago.
14 FATIGUE STUDY
not eliminate, and did not expect to elimi- nate all of the fatigue accumulated in the working day. The bricklayer at the end of the day, by reason of motion study de- vices, laid more brick, but was neverthe- less much less tired. Experimental work in his case was carried to a high degree of perfection, because he was recognized as a splendid type of efficient brawn.
The Problems of Fatigue Study.
The problems of fatigue study are, then, four, which may be stated in very simple terms :
1. To determine what fatigue is unnecessary.
2. To determine what fatigue is necessary.
3. To eliminate all unnecessary fatigue pos- sible.
4. To distribute the necessary fatigue prop- erly, and to provide the best possible means for speedy and complete recovery.
The Methods of Fatigue Study.
The methods used must rest on a scientific basis. These methods are the same for the ex- pert and for the man making his first attack on the problem. They are as follows :
DESCRIPTION AND GENERAL OUTLINE 15
1. Record present practice, make an accu- rate and complete account in writing of what is actually being done.
2. Decide in what sequence things are to be measured, and put them in such shape that they can be measured.
3. Apply accurate measurement.
4. Determine standards synthetically from the measurement, and make such changes in practice as will make it conform to the standard.
5. Compare the new standard practice with the old practice. Determine exactly what improvements have been made, in order to be able to predict the line along which new improvements must lie.
This is the standard method of attack of meas- ured functional management. It can be the more successfully applied to fatigue study in that the results can be checked at every point by the results of motion study, which bear a constant relation to them.
Emphasis in Fatigue Study.
Any such study as this demands an emphasis 1 upon accuracy. The man making the study must
16 FATIGUE STUDY
have a strong desire for finding and writing down the facts. He must have willingness to submit every aspect of the problem he is studying to the test of accurate measurement. Along with this desire for facts must go a realization of how the facts are to be used. Fatigue study is a con- structive study. It builds up. It uses such terms as " elimination," but its fundamental aim is conservation, and this conservation includes adding to those things which make life worth while. The desire to act as a force for better- ment must be the incentive that makes the man doing fatigue study ready to record and face the actual facts.
A Work for Every One.
Recording facts is difficult work, but there is no one who cannot do some of it. It is the duty of every man to face the facts with which he works and to record them. You have come from the crowd of tired workers with an incentive to do this. Here is the method by which it may be done.
DESCRIPTION AND GENERAL OUTLINE 17
Summary.
Fatigue study is related to motion study in that both are branches of waste elimination. Fa- tigue study classifies fatigue, and outlines meth- ods by which unnecessary fatigue may be elimi- nated and rest from necessary fatigue may be provided.
CHAPTER II
THE FATIGUE SURVEY: WHAT IS TO BE DONE
What a Survey Is.
A survey is an attempt to record existing con- ditions. It gives :
1. A general view.
2. A more particular or intensive study of the various parts of the whole and their relation to one another.
It may include recommendations for improve- ment, but its primary purpose is to record what actually exists.
The survey is a systematic study of existing conditions. Those making it have always a well- defined plan in mind. It is necessary, in order to maintain a proper balance for the completed survey, to give a properly proportioned represen- tation of what happens, with no element omitted or over-emphasized.
18
FATIGUE SURVEY 19
The General Survey and the Fatigue Survey.
The fatigue survey should be a department of the general survey. A description of the appar- ent causes of fatigue, or of the devices present that eliminate fatigue, can mean little without the accompanying description of the worker, the conditions of the work and the work itself. The fatigue survey might be made without a general survey. From the results, fatigue might be eliminated, or better means for overcoming fa- tigue provided, but there would be no assurance that the records applied would be efficient, or do lasting good, if the causes of fatigue were not understood. The causes could not be under- stood without the general survey. The fatigue element receives more emphasis than any other element of the general survey. We look for fa- tigue first, last, and all the time, but we record with it all the attending circumstances that we can observe or discover.
The Aims of the Fatigue Survey.' The fatigue survey aims :
1. To present an accurate picture of exist- ing conditions from the fatigue stand- point.
20 FATIGUE STUDY
2. To enable all interested in fatigue elimi- nation to visualize the problem thor- oughly.
3. To divide the problem of fatigue elimina- tion into such working units that it may be possible to attack the problem success- fully from the start.
4. To arouse the interest of every member of the organization in fatigue and its elimi- nation.
5. To show the relation between fatigue and activity.
6. To teach every member of the organiza- tion to conserve his working powers.
The Time and Place of Making the Survey.
The survey should be made as soon as plans for making it are completed, and before any changes in the actual practice are made. If there is any idea of changing the type of management, it may well be made even before such a change is thor- oughly outlined. It is the first step to be taken by any organization which is thinking of intro- ducing the scientific type of management. The entire "plant" should be surveyed. The work
FATIGUE SURVEY 21
should start where there is the most fatigue, and where the greatest amount of good can be done immediately. This, for several reasons ; such as :
1. The largest amount of waste can thus be eliminated.
2. The co-operation of the workers will be most quickly gained. This will be true not only of the workers actually studied, but of all of the workers in the organiza- tion. They will appreciate the attitude of the new management, and will be glad to help if they can see the actual benefit from the start.
3. The survey maker will become encouraged as he sees his data successfully used.
4. The survey, if made by an amateur, will help him when he attacks more difficult problems.
If the survey maker is an amateur, he had best begin where working conditions most demand betterment. It is simpler to record working con- ditions than to describe the worker or the method by which the work is done. A really adequate record of a worker requires a knowledge of physiology and psychology. An adequate record
22 FATIGUE STUDY
of method requires an expert knowledge of mo- tion study. A preliminary record of fatigue of all sorts may be made by an amateur. He had best, however, get his practice in recording work- ing conditions. Moreover, it will be best to ob- serve a worker who is known to be co-operative at the start. The co-operation of the worker is the most important element in getting accurate records. Such workers will also help from the start to suggest or invent devices for eliminating fatigue, if they are started thinking along these lines. Later, one can handle the non-co-opera- tive as one becomes more practised, and there is always the likelihood that, by the time one gets to these at first non-co-operative workers, their attitude will have been changed by the good re- sults and the general sympathy towards the fa- tigue survey.
The Qualification of the Survey Maker.
The survey maker must be an accurate ob- server. He must be able to see what the condi- tions really are, and to describe and record what he sees in simple, clear language that will enable others to understand what he says. The survey
FATIGUE SURVEY 23
may be made by any one of several types of sur- vey maker:
1. The owner of the plant. He will have the most vital interest in the resulting fa- tigue elimination. No matter who else makes a survey, the owner should ex- amine it closely, or should make one for himself. We have found that, if the owner can be persuaded to take one day of his time to make even a most rapid and superficial fatigue survey of his plant, the result is always of enormous benefit to the work; but, while his interest may be enlisted with a walk through his plant, his zeal will not be obtained until he has actually sat in the various seats and chairs, and actually, personally, tried out the various work places.
2. The survey may be made by some other member of the organization, who is an amateur at the work. The benefits of having a survey maker who is a member of the organization is that he " under- stands the peculiar and local conditions " thoroughly, and that those who are ob-
FATIGUE STUDY
served may therefore have more con- fidence in his work and perhaps may be less apt to resent being observed. The disadvantages are that he will be so well acquainted with and accustomed to see- ing the conditions that he will not be apt to note many apparently unimportant de- tails. These may really be important, when one comes to make changes.
3. The survey may be made by an amateur not a member of the organization. The advantage of this is that the observer will be disinterested. The disadvantages are the usual disadvantages of lack of train- ing. There may, also, be some delay in the observed worker's co-operating with the observer. This is not apt to occur if the survey maker is properly instructed before he begins his work.
4. The survey may be made by an expert. It makes little difference, in this case, whether the expert is, or is not, a mem- ber of the organization. In actual prac- tice he seldom is a member of the or- ganization.
FATIGUE SURVEY *5
There is much saving in time in having an ex- pert survey maker, who will be, in the indus- tries, preferably a motion study expert. From extensive practice he will be able to see possible improvements at the same time that he sees ex- isting conditions. However, he must not let his plans for improvement affect the exactness of his records of the present. On the contrary, these plans will insure that he makes his records of the present detailed and accurate, in order that the progress may be apparent.
Whatever may be the preparation of the sur- vey maker, his chief qualification should be a keen interest and enthusiasm for this work. If a man really wants to eliminate fatigue, and is willing to learn how to do it, he can become a survey maker.
What to Look For.
There are three chief groups of things to look for:
1. The characteristics of the worker, or, as we have called them, " variables of the worker."
2. The characteristics of the working con-
26 FATIGUE STUDY
ditions, — " the variables of the surround- ings, equipments, and tools." 3. The characteristics of the methods of work ; that is, " the variables of the mo- tions." l
First, in describing the worker, there are sev- eral possible methods of obtaining valuable in- formation. One is by observing him. A second is by talking with him. Before using either of these, it is necessary to see what records of him are already in the hands of the management. There will probably be some information in the employment bureau, if an employment bureau ex- ists; if not, the man who hired him may have some data concerning him. Usually this will save the worker's time in answering questions. It is well to know as much as possible about the worker's life history and home conditions, — this especially that one may understand whether he goes to work refreshed or tired in the morning. The procedure may be as follows: 1. Kecord the man's name, age, birthplace, preparation, experience, and fitness, i See " Motion Study," pages 6 and 7.
FATIGUE SURVEY 27
These last will all be a help in determin- ing the percentage of fatigue.
2. Record the man's physical character- istics, as far as can be observed ; such as, size, strength, skill, strong points, and weak points.
3. Record, as closely as possible, the man's behaviour, as indicating his mental con- dition. To be specific, note whether he seems interested in the work. Note his habits of doing the work, — whether he does the work the same way every time, or whether he varies in his methods. Note his degree of ability to learn quickly, Note his power of concentrating atten- tion. Note his degree of contentment with the work.
The degree of detail with which this notation may be made by an amateur doing the work de- pends largely upon his training in psychology. Second, in recording working conditions: 1. Record those things that affect all work- ers in the group. These are the length of working day, condition of lighting, heat-
28 FATIGUE STUDY
ing, cooling, and ventilating; fire protec- tion ; safety protection as it affects all, — this to include protection from dust, lint, or any substance which might affect health.
2. Record the conditions that affect the in- dividual worker: — places of the work; the work bench or table or other device for holding the work ; the chair, foot rails or rests, or other device for affording rest to the body or some part of the body ; the material worked on and its placing; the tools or other devices by which the work is done; the clothing of the worker.
3. Record the results of the work: — the average amount of output; the hours of the working day when most fatigue seems to exist. Record which conditions ob- served are the result of work having been done by the management, and which are the result of work having been done by the individual worker.
If a general appearance of fatigue seems to oc- cur at any time, make special notes of all attend- ing conditions of every kind. Note anything
FATIGUE SURVEY 29
that is particularly good or particularly bad. Third, little can be done at this stage by the amateur survey maker in recording the variables of the methods, and in making motion analysis charts. He may, however, make notes of meth- ods that seem to him unusual or efficient. For example, if he observes two workers who seem physically much the same, and who have prac- tically indentical surroundings, and finds that one of these accomplishes more than the other, or is less fatigued, the difference is likely to lie in the motions or the methods used. These should be carefully noted. Such data as these will prove of value in the intensive studies of motions to be undertaken later.
Variables that Affect Fatigue.
We included in " Motion Study," l a list of forty-two variables that affect motions. The list we use consists of one hundred and nineteen. We feel that our list is by no means complete. I It is necessary only to note here that every pos- ! sible change in the work, the worker, or the method has its effect upon the fatigue. This)
i D. Van Nostrand Co., 25 Park Place, New York City.
30 FATIGUE STUDY
need not act as a deterrent from making changes. It need only act as a warning that no change made without a thorough consideration of every element of the problem can be of permanent value.
The Survey Record Sheet.
The survey maker will do well to list all of the things, which he intends to look for, upon one sheet, which he may use as a tentative record sheet. Such a sheet will prove itself an admir- able record of how far advanced the organization is in fatigue elimination. The survey maker in any particular plant may modify it to suit in- dividual conditions.
The making of such a record sheet is most stim- ulating to the survey maker. He should make a collection of all the different survey sheets ob- tainable, even though used in the social or edu- cational fields. He should be required to make at least a tentative sheet of his own. Through his attempts to do this, he will come, as in al- most no other way, to a realization of the impor- tance of the problem that is before him.
FATIGUE SURVEY 31
Survey Photographs.
A photograph is one of the most satisfactory survey records. It is not always easy to get such a photograph. In the first place the survey maker is not sure what should be photographed. In the second place the worker is not always eager that he or his work place should be photo- graphed. This is even more true of the manage- ment than of the men. Some managers are not willing to allow their work places to be photo- graphed, when they realize that such photographs will live as " before and after " records. Where photographs can be taken, they are the ideal records, in that they are accurate, detailed, un- prejudiced, easily understood, easily preserved, and constantly available. We have found the / photograph the most valuable of records, and/* • - have used it continuously since 1892. On every V side we find that scientists are more and more realizing the importance of the photograph record. A trained photographer often has the desirable qualities to become an admirable sur- vey maker. The motion picture film makes it possible to record activity as well as rest.
32 FATIGUE STUDY
Making the Survey Serviceable.
Such photographs form an important element in making the survey serviceable. The survey is an admirable record to use after improvements have been made, to show exactly what the trend of progress has been. It is, however, most im- portant, as furnishing the working data from which the actual improvements are made imme- diately. To be serviceable, then, the survey must do certain things :
1. It must make it possible for any one studying it actually to realize existing conditions. It is apparent what a help the photographs are in thus visualizing the problem.
2. It must emphasize those conditions that require immediate and great improve- ment. These can be shown most plainly by photographs, but it must be remem- bered that a photograph without a proper written explanation often means but a small portion of what it should to a man who has not himself seen the conditions.
3. It must be in such form that it can be
FATIGUE SURREY 3$
easily followed or studied. This will be assured if the plan has "been properly made, and if the plan outlined has been consistently followed.
4 The observations should be grouped. The groups should be put under appropriate headings. The order should be excellent. It will help greatly if partial and final summaries are in- cluded.
The amateur will do best to put all of his recommendations for changes at the close of the survey. Such recommendations should certainly be included. The survey maker should note the improvements that occur to him while making the survey. This he may do on the regular sur- vey blank, but when writing up the survey, he should put his suggested improvements in a sepa- rate place, for the following reasons : His sug- gestions may be good, but may be only a few of possible suggestions. Beading them with the survey may prevent the reader from thinking out suggestions of his own. Again, the suggestions, while good, may be obvious, in which case the reader might consider the entire survey a record of obvious facts, which, therefore, is of little
34 FATIGUE STUDY
value; in which case, while it is well to record them, it is seldom advisable to include them in the body of the survey. The reader may lose in- terest because of the suggestions, and may fail to realize the value of the record itself.
Another means of making the survey service- ^ is to pay strict attention to the style. This
should be the extreme of simplicity and clearness. Use short, familiar, and necessary words. Use short sentences requiring no punctuation except the period. In fact, wherever possible, use a printed form, and write in the fewest possible words that can include a simple, definite, and complete description. Wherever possible, make the survey so interesting that it will hold the attention without effort. This has been done, and can always be done. Photographs, espe- cially stereoscopic photographs, are of great as- N^sistance; so are charts, or graphs, illustrating the results of the observation; and tables that will show facts, recapitulations, and tendencies, at a glance.
The data of the survey may be written up by the survey maker, if he is clever' at such work ; if he is not, it had better be written up by some one
FATIGUE SURVEY 35
to whom he explains it, and who is naturally a clever writer.
The survey in proper form can be used as a force to arouse interest in fatigue elimination throughout the entire organization. It must be put in the most attractive form possible. As an illustration of the possibilities in making dry ma- terial interesting, study the farmers' bulletins used by the national government and various State governments, especially the bulletins of Kansas and Wisconsin.
It is a courageous organization that would con- sent to making its original fatigue survey public However, the survey should certainly be in the hands of every member of the organization who desires to see it. It will be recognized that the survey is the starting point for making improve- ments in the elimination of unnecessary fatigue. Too little is often done to take the workers into the confidence of the management. The fatigue survey might well act as a starting point in this direction; therefore, if not the entire survey, it is certain the examples worthy to be copied should be freely circulated. The efficiently, spe- cially-clothed worker, the excellent arrangement
36 FATIGUE STUDY
of tools, the best arranged work place, — photo- graphs and descriptions of these might be posted to excellent advantage.
After all, the real aim of the survey is to be serviceable. It will be most serviceable when it is used by the greatest number of individuals, and it will be chiefly serviceable in that it stimulates them to do something definite to improve condi- tions. It must suggest what is to be done, and where it is to be done. As to when the improve- ments are to be made, there are certain things that can be done immediately, — as soon as ex- isting conditions are understood. Our next task is to show what these are, in order that the stimu- lated organization may expend its energy for the greatest amount of permanent good to the great- est number.
Summary.
The fatigue survey is a record of present con- ditions and practice, that endeavours to show particularly and in detail where and when fa- tigue exists. This record contains a description of all the attending circumstances. It is to be in such form that it may be easily read and un-
FATIGUE SURFEY 87
derstood. By studying it, any one interested may learn where fatigue exists, and may receive suggestions as to how it may be prevented, elimi- nated, or remedied.
CHAPTEE III
PRELIMINARY PROVISIONS FOR REST FOR OVER- COMING FATIGUE
Provision for Rest.
^ The first necessity in our fight against fatigue is to eliminate the causes of unnecessary fatigue. The second is to provide for proper rest to over- come fatigue, whether necessary or unnecessary. If the worker goes home too tired each night, the first method of remedying this condition is to provide rest peripds during the working day — to set aside time in which he may recover his proper and normal working strength. One method by which this may be sometimes done is by short- . ening the working day. This permits the worker tto get into better condition either before work, rafter work, during a lengthened noon hour, or during the " second breakfast " and " tea re- cess" of many European organizations. The supposed advantage of this plan is that it gives
38
PRELIMINARY PROVISIONS FOR REST 39
little or no jolt to the working process. To this we might answer, as circumstances vary, that it does give a jolt, because speed must be increased in order that output should be maintained; or we might say that the jolt is really needed. The disadvantage, in some cases, of shortening the working hours is the effect upon the entire in- dustry in the vicinity. This is a feature to be considered, for in the long run maximum pros- perity is dependent upon largest outputs. There can be no doubt that in most cases it is advisable and profitable to shorten working hours, but how and when this is to be done is a serious problem. In our own office, our stenog- raphers work every other Saturday till 1 :00 P.M. only, and the alternating Saturday they do not work at all; that is to say, we give them a holi- day of Saturday afternoon and Sunday every other week, and all Saturday and Sunday the other weeks, besides their regular two- weeks va- cation in summer. We find that we get more and better work as a result. No plant, operating un- der the measured type of ^management, that we know of, has ever regret t^<rshortening its work- ing hours. It may be that the working hours
40 FATIGUE STUDY
formerly existing were so long that shortening the hours was the only immediate adequate remedy. The danger in shortening hours is that, if the whole problem is not thoroughly studied, the worker may not be sure of the same or a larger wage for work which he is able to do in the shorter time. Fatigue elimination is funda- mentally the duty of the management. The worker cannot afford to pay for the fatigue elimi- nation, directly or indirectly. Let the short hours be planned for and assured, but make sure before introducing them that everything is in such condition that wages can be maintained or , raised. This is a matter requiring study of ac- tual records and not " guess," " personal opin- ion," or " judgment,"
There are other methods of providing for fa- tigue elimination or recovery, that do not involve so many elements. Such a method is providing rest periods during the working day. This is a method that may be used immediately. To whom are these rest periods to be given, then? Ultimately, of course, to every member of the organization whose work is of a nature that re- quires a fixed rest period. The work should,
PRELIMINARY PROVISIONS FOR REST 41
preferably, be so arranged that every worker, be he in plant or in management, would achieve larger outputs by having definite and properly located rest periods. It has been proved in most work that more output can be achieved by ap- plying one's self steadily for short periods, and then resting, than by applying one's self less steadily and having no rest periods. This, of course, applies only to work which in itself pro- vides no rest periods. At the beginning of the fatigue eliminating campaign, provide rest peri- ods for those who seem to need them most. There are two, off-hand, quick methods of de- termining which workers these are. One is the appearance of the workers at various times of the day, and at the end of the day. The other is the amount of output and the rate that output is turned out by the worker during the day and during the various parts of the day. In some organizations, it has been the standard practice to take no chances when the worker looks or feels tired. They provide rest periods immediately, long enough to allow him to recover and go back to the work with zest. This is, of course, the im- mediate remedy. " Provide the rest period first.
42 FATIGUE STUDY
Discuss its efficiency later." This first-aid plan has worked splendidly for a long time among women workers in such industries as the dry- goods trades. The typical welfare work may be unscientific from the standpoint of those fa- miliar with highly organized methods, but it has sensed the trouble keenly and quickly, and pro- vided at least a temporary remedy without de- lay. " Time to rest when one needs it." This is the first slogan of the campaign for eliminating the evils of overfatigue.
Chairs to Make the Rest Most Effective.
The merchants have again been the pioneers here, in realizing that reclining chairs or couches furnish the most effective rest. It is not neces- sary here to discuss the physiological effects re- sulting from a change of blood pressure. It should be noted that even a few minutes in a re- clining position provides such rest as could not be gained in a much longer time if seated upright in the most comfortable of chairs. If attending conditions allow of reclining chairs or couches, for at least the exceptional and emergency cases, these should immediately be provided. It surely
PRELIMINARY PROVISIONS FOR REST 43
does take real courage for the management of an organization of strong and strenuous men to in- stall reclining chairs, couches, and high foot-rests for rest periods ; but fame awaits the one in this field, who can make the practice general. The brain worker of all types has long realized the benefits of the occasional use of the reclining chair. Flat couches without even the smallest of pillows are a part of the regular working equipment of some of our greatest brain workers. It is considered no disgrace, nor is it worthy of note, if a tired soldier flings himself flat upon the ground to rest. It attracts no attention for an exhausted worker to go to sleep on a hard wooden bench at noontime. But to put a couch in some quiet spot, or even a chair with extra- high, large, flat, arm rests, where the same type of rest might be enjoyed most effectively, t his seems radical, and " might make the men think we had gone crazy." It might be objected that the worker should not allow himself to become so fatigued that this type of rest is necessary. The answer is, — if rest in this position will over- come what is almost complete exhaustion, what increases in national efficiency and prosperity
44 FATIGUE STUDY
may it not cause in overcoming quickly less vio- lent stages of fatigue?
Next to the couch or reclining chair, in effi- ciency, is the arm-chair. There are " arm- chairs," and chairs with real arms specially fitted to the individual worker. These will be even more efficient if provided with a foot-rest. We have actually installed such arm-chairs out in the works with very good results. We have had many a case where even the workers laughed loudly when the special, unusual chairs were brought in. They began to use them more out of friendliness towards us than out of any belief in the special usefulness of these peculiar chairs. However, at the end of a few days of actual use, they were able to handle their work in greater quantities and with less fatigue. " It's a joke to work like that," one said. Some of the work- ers claimed that they did not need such a chair, but, after it became the fashion to use it, each one seemed glad enough for the better rest pro- vided.
From this type of chair down to the smallest possible seat, the gradation is gradual and con- stant. In certain types of work, like selling in
PRELIMINARY PROVISIONS FOR REST 45
a drygoods store, the space is sometimes so nar- row that the only type of chair practicable, un- der present conditions, is the small folding seat that can slip under the shelves or fold up against them when the girl is serving a customer. Such also is the type of chair that folds up under or next to a machine, which the operator is tend- ing, and which can be pulled out during the peri- ods when the machines need no tending, and the operator is simply inspecting or waiting for the next tending period. Every one realizes the ad- • vantage, as a resting device, of anything upon which one can occasionally sit. The two-inch, iron arm of a seat on a railroad train, the tiny seat that folds into a walking stick or umbrella, that the enthusiast at the races takes with him, — these are typical examples of seats that seem al- most ridiculous, yet that have an enormous effect upon the amount of fatigue accumulated in a few hours, or in a day. " A chair to rest in ; " this is the second slogan. If a chair is not procurable, then some sort of a seat, even a packing box with no back, even a post to lean against, or a rail to lean upon, — anything to shift the pressure « is better than nothing. Far better a seat with no
46 FATIGUE STUDY
back, immediately, than the best type of chair in the indefinite future. Get some sort of seat for the worker to-day, and begin planning for the efficient chair at the first day possible.
The final word on chairs in this preliminary work is that some sort of a chair should be pro- vided for every member of the organization. There is a wide-spread belief that one chair for every two or three or more workers is sufficient ; that " they can change off using it." The argu- ment was something like this: "No one needs to sit more than one-third of the time, therefore one chair to each three workers is enough," etc. The chief fallacy is the implied idea that the rest periods of the workers can be so arranged that the chairs can be in constant use, and that each worker will have a chair at his or her dis- posal at the proper time. Now in theory, of course, this is not an impossible arrangement. It might have to be made if chairs and seats cost many dollars apiece, and it probably would be done then, if there was a proper realization of the importance of overcoming fatigue. But when chairs are as cheap and plentiful as they are now, there is no excuse for thinking of such
PRELIMINARY PROVISIONS FOR REST 47
a condition. In practice, where there are not enough chairs for every one, at certain times of the day the chairs are empty, as every one is busy. At other times, when work is duller, the chairs are all used, and many workers are try- ing to rest as best they can, standing. These conditions can be noted in any drygoods store, in any shop or factory where there is an inade- quate supply of chairs. "A seat for each and every worker whether he needs it or not;" this is the third slogan.
Betterment Work.
The third division of provision for rest falls under the general heading of betterment work, or what is popularly called ^welfare work." The term " betterment work " is used by those who are interested in measured management in- stead of " welfare work," to emphasize a dis- tinction in thought. Some welfare work implies that it is the gift of the manager to the workers. Betterment work is the same type of work, done- with the distinct understanding that what is done is for the good and profit of the organiza- tion. It is the due of every member of the or-
48 FATIGUE STUDY
ganization to have the best resting condition pos- sible. Making these conditions better is better- ment work. There is no intention to criticize welfare work. Most welfare work is betterment work. Some workers, however, object to wel- fare work as implying " charity." Therefore, we say betterment work. It is the worker's due that he gets. Such work comprises establishing rest rooms, lunch rooms, entertainments — any- thing that can make the resting time more attrac- tive and profitable. It may also imply the serv- ice of a betterment worker or a staff of such workers ; or it may be that the organization itself takes up the work co-operatively, with no out- sider to direct it. Doubtless some such activity already exists. If so, it would be the duty of the fatigue eliminators to recognize it and en- courage it.
The fourth provision for rest is really a part of betterment work. It must be described at some length. This is the Home Reading Box Movement, which furnishes a definite means for making rest periods, both at work and at home, attractive and profitable. Before turning to a description of this, we may estimate the effect
PRELIMINARY PROVISIONS FOR REST 49
upon the worker of the preliminary work so far done.
Results.
The results of the preliminary work we have done are as follows :
1. The interest in fatigue becomes more vital. We have aroused more interest in fatigue elimination, and have made it general. With the establishment of properly distributed rest periods, chairs, seats, etc., the recovery process becomes interesting. As he knows how resting improves his working conditions, the worker becomes more warmly interested in the fatigue itself. It is a very differ- ent thing to talk about the evils of fa- tigue, or even to see the advantages of proper rest exhibited in object lessons, than it is to get proper rest in a specially designed chair for the first time in one's working life. Fatigue, which was an enemy, becomes now not only my enemy, but our enemy — mine, because I recog- nize it has affected me; ours, because we
50 FATIGUE STUDY
arc fighting it together for our best in- terests, severally and collectively. 2. The interest in fatigue becomes more intelligent. Many workers, especially women, feel that it is to be expected that they will get exceedingly tired by night ; that one cannot expect to do so much late in the day as early in the day; that stopping to rest is cutting down one's output, thus cheating one's self, if one is a piece rate worker, or cheating the man- agement, if one is a day rate worker. The worker now comes to realize that he hurts the management and himself, when he gets too tired. " It is your duty to rest when you need it ; " that is the fourth slogan. It must be remembered also that the rest periods provide time for clearer and more intelligent thinking. It is impossible to come to any valid con- clusion when one is working at top speed part of the day, and in a state of exhaus- tion the rest of the time. We have now an opportunity to think, and brains rested enough with which to think.
PRELIMINARY PROVISIONS FOR REST 51
3. The output increases. ' Usually, in prac-"U A/\ tice, the output increases as a result of the fatigue-recovery periods. Increased outputs encourage both management and worker. They must, however, be in- spected and controlled. Some one with the proper training must be in charge, that excessive fatigue may not be ac- cumulated, and the rest periods lose their purpose. With the increase in output • must come added compensation in wages'. If this is provided, the fatigue eliminat- ing campaign will not be regarded as a , new scheme for driving the worker. Better for the good of the management and the men to limit the output to its usual amount during this period, until the workers see that too much fatigue to- day interferes with the standard quan- tity of output to-morrow, than to attempt to allow increased output without in- creased pay. The world can better af- ford to lose the extra product, than the management to appear even for a moment to be trying to overwork the men.
52 FATIGUE STUDY
4. The spirit of co-operation grows. The worker realizes instinctively, if the sur- vey has been properly made, and if this preliminary work has been properly done, that the aim of fatigue study is the good of all concerned. There is a psy- chological element to this. It might be possible to question the motive of in- stalling fatigue eliminating devices. There is no question as to the motive in in- stalling the resting devices and rest peri- ods. The rest periods allow time for de- velopment of the social spirit. " To know all is to understand all," a wise Frenchman has said. " I like every one whom I know," is the thought of another wise man. " Let's go at the fatigue sur- vey all together," is the fifth slogan. The Home Reading Box Movement is, perhaps, the channel where this spirit of co-operation expresses itself most freely.
/ Summary.
Preliminary provision for rest for overcoming fatigue consists of establishing rest periods, pro-
PRELIMINARY PROVISIONS FOR REST 53
viding chairs or other devices in which one may rest, and establishing or encouraging betterment ^ A* work. These result in a more vital and intelli- gent interest in fatigue, and a spirit of co-opera- tion. This work is embodied in five slogans. These are as follows : " Time to rest when one needs it ; " "A seat to rest in ; " "A seat for each and every worker whether he needs it or not ; " " It is your duty to rest when you need it," and " Let's go at the fatigue survey all together."
CHAPTER IV
THE HOME READING BOX MOVEMENT
What It Is.
The Home Beading Box Movement is a sys- tem of placing interesting, educational, and val- uable reading matter at the disposal of the work- ers in an industrial organization. It consists of
1. A box in the plant in which the reading matter can be placed and kept until taken out by the workers.
2. Boxes in the homes of members of the organization or of the community inter- ested, where reading matter intended for the plant can be kept until it is collected.
3. A system by which the reading matter gathered in the homes is taken to the plant reading box, is taken from the plant box to the homes of the workers, and, in turn, either returned to the plant or passed on to other homes which would have pleasure or profit from it.
54
HOME READING BOX MOVEMENT 55
The Box in the Plant.
The box in the plant is located at a place most convenient for the workers. Its size depends upon the size of the collections. It should be large enough to hold two collections of papers, magazines, and books. It should be located where the workers can get to it without loss of time and with fewest motions. The best place is usually near the path of exit after the day's work. It will simplify the routing of the reading matter, if the box is put under a window next to the street, so that magazines can be put in by any one driving or walking by, without coming in and thereby possibly disturbing the operation of the plant. The box is made a regular part of the plant equipment by receiving a station num- ber like every other " station " on the mes- senger's route. The first box installed happened to be No. 34. All boxes since have received this number, and the same number becomes the home reading box symbol, thus, — " 34."
The Plant as a Source of Supply.
It is invariably a surprise to the management, as well as the workers, to find how much reading
56 FATIGUE STUDY
matter for the home reading box is available in the plant itself.
Every business man receives quantities of catalogs and other business and technical litera- ture, and sample copies of publications, sent in the effort to get new subscribers. These are glanced at by the man receiving them, and then and there usually thrown into the waste-basket. A catalog is the best literary effort of the con- cern it represents, and usually contains valuable instruction. Now if the mail sorter or the pur- chasing department see no immediate need of the things in the catalog, it usually finds its way quickly to the waste-basket. That such catalogs have a decided interest to the users of the home reading box is shown by the fact that new catalogs are always taken away to the homes. The average manager has not the time to give each catalog the attention that it really deserves,,but in the majority of cases there will be one or more men out in the plant who have both the time and interest to devote to the cata- log. These usually discarded catalogs are sometimes read to see if they will not contain a thought for the " suggestion " box ; the by-prod-
HOME READING BOX MOVEMENT 57
net being that the plant is kept up to date, so far as information contained in new catalogs is concerned. In the same way sample maga- zines or papers may come in, which make no par- ticular appeal to the man to whom they are sent, or a magazine brings a marked article which is cut out and put on file, — the rest of the maga- zine being thrown into the waste-basket.
All of this usually discarded material can be, with profit, sent to the home reading box. The man in the office, who looks at and discards it, simply stamps or writes on it " 34," the symbol of the home reading box, or the number of its station in the inter-office postal system, and puts it in his " out " basket. On his next trip for distributing papers, the messenger takes the reading matter marked " 34 " from the " out " baskets, and deposits it in " 34," the home read- ing box.
Another source of supply consists of the news- papers, magazines, or books bought by the mem- bers of the organiaztion as they come to work. The average man in the management depart- ments buys a paper or magazine as he comes to work. His daily paper is surely discarded, his
58 FATIGUE STUDY
magazine is often discarded, sometimes even a book is thrown aside as completed. These also go through the " out " basket to the home read- ing box. A cent or two a day for a morning pa- per is little or nothing to some members of the organization. A cent or two a day is a very important element in some working men's bud- gets. Besides there is an enormous waste, if daily papers are thrown away after having been read by but one person.
The Home Element.
A home reading box which has no other source of supply than that mentioned is not to be de- spised, but many advantages of the movement are lost, of course, if it is so restricted. It is de- sirable and customary, therefore, to interest as large a number of homes as possible in the move- ment. There are, first, the homes from which reading matter comes. The first problem is to arouse interest in such homes. The conversa- tion goes something like this:
" Haven't you some reading matter that you wish to get rid of, that we could have for the Home Eeading Box Movement? "
FIG. 2
This shows a typical collection of magazines ready to go to the Home Reading Box at the plant.
FIG. 3
This shows the passing of magazines from the wagon into the plant. The plant box is placed directly below the window, where, if no one is inside waiting to take the magazines, they may easily be dropped from the outside of the plant without disturbing any one in the plant.
HOME READING BOX MOVEMENT 59
" Just what do you want? "
"Well, anything that is interesting, but es- pecially magazines of recent date, with which you have finished."
" Oh, but we get hardly any magazines. Let me see. We do take the Saturday Evening Post, and my wife reads the Home Journal and the Woman's Home Companion, and I buy some of the weeklies and some of the monthlies."
"And you get trade catalogs and trade pa- pers of various kinds besides? "
" Oh, yes, we get some of those that pertain to our business."
" Well, what do you do with them all, when you have finished reading them? "
"Why, we throw the advertising matter into the waste-basket, and the trade papers we keep with the idea of binding some day, but we never have bound them. I .don't know exactly what does become of them. I don't think we ever really look at the old ones."
It is this reading matter that we desire to send promptly into some home reading box. As to the other homes to which the reading matter ultimately goes, these may be, or may become,
60 FATIGUE STUDY
or may help others to become, the same type of home. At present little reading matter, can en- ter, because the wage earner cannot spare enough from his wages to buy much literature, and is too tired to go to the library in the evening. There is often the same desire for reading in this home, though it has not had such a chance to become trained. The whole family has the same desire to see the pictures, and the children the same joy in colouring the drawings or cutting them out. The neighbours will like to borrow anything that is interesting, and the reader will increase his stock of information and his vocabu- lary, and form the habit of reading besides. There are exactly the same possibilities of de- veloping habits and tastes. All that is lacking is the opportunity.
The one hope for the working man is through education, and the greatest educational possibili- ties now, with very few exceptions, go into the waste-baskets of the nation. For example, con- sider the pile of Saturday Evening Posts that come out each week. These would make a pile more than three miles high each week. Think
HOME READING BOX MOVEMENT 61
of the many other magazines and their effect upon homes that cannot afford to buy them.1
Routing the Magazines.
The whole problem is to get the magazines from the home to the plant promptly and in the easiest way possible. When the first home read- ing box was established, we carried the maga- zines in our arms from our homes to the plant, where the magazines found their way to the home reading box by means of the inter-office mes- senger system. As other people became inter- ested, there were more magazines than could be conveniently carried, so we sent an automobile around, now and then, for collecting the maga- zines and taking them to the plant. Gradually other people were asked to co-operate, and regu- lar collections were made monthly by some mem- ber of the organization, who had time and an automobile at his disposal. If the auto was busy or the weather bad, an express wagon or a truck went the rounds. The aim, however, was, and is, always to have the collecting a part of
i The publishers are all in favor of the Home Reading Box Movement, as it creates readers.
62 FATIGUE STUDY
the co-operation plan. It became a common sight in the town where the movement started to have a college professor take a Saturday after- noon off, and collect the magazines in his electric coupe, or to have one of the boys and his chums go out in a touring car, and fill the box at the plant, so that the men would find a fresh supply Monday morning. In some plants, where none of the homes in the vicinity has reading matter, it is boxed and sent by express from friends of the movement at a distance. Some bundles have come from as far as Bryn Mawr for the Home Beading Boxes in Providence.
It is a great sight to see the big bundles come in, and to watch the workers, as they are opened. Every one is allowed to take what he pleases and as many as he pleases. There have been no re- strictions whatever, because the unhampered privileges have not been abused. He may bring any back, if he chooses, or he may keep all he takes, or he may pass them on to his less for- tunate friends or neighbours who are not em- ployed in a plant having a home reading box. He is rather urged to pass them on when he has finished with them, as we wish to maintain the
HOME READING BOX MOVEMENT 63
reading club, or circulating library, idea. We consider the reading matter as loaned, and to be passed on in an endless chain. If the worker chooses to consider what he gets as a gift, that is his privilege. He may break the chain with- out reproach; in fact, breaking the chain has been the cause of starting real libraries on a small scale in many houses.
The Problem of Maintenance.
There are various important features to the maintenance problem. In order that the sup- ply may remain sufficient, as large a number as possible of co-operators must be secured, and they must, naturally, be required to do the least amount of work possible.
In Providence, where the work started, the work was, during this first or starting period, placed in charge of a young man who devoted considerable time to putting it on a systematic basis. He divided the city into four districts, each district representing a telephone exchange district. Koutes for collection were made out, and volunteer collectors assigned to the differ- ent routes. Notices of collections were sent out,
64. FATIGUE STUDY
and schedules strictly adhered to. Co-operators were, of course, allowed to keep their magazines in any place or in any way that they chose, but were urged, when convenient, to place the col- lecting home reading box in their respective front halls, near the front entrance, where, on the day that the collector called, the box could be emptied by him into the waiting automobile with least possible delay to him and with the least inconvenience to the household. As the list of subscribers, or co-operators, has grown, it has been a simple matter to amplify the routes. The same methods of collection are maintained.
In another plant, each member of the or- ganization is responsible for what he can collect, and brings it to the plant himself.
At a girls' college, where there is a branch, the girls collect the magazines in the dormitory, or ask their parents and friends to express what they have finished with, and then box the sup- ply at intervals and express it on to the selected plants. We recommend this method because it is so simple.
At the present time the home branch demands a very small amount of time for operation.
HOME READING BOX MOVEMENT 65
" Make it easy for every one/' might well be the motto of the home reading box movement. The " out " basket and the inter-office system furnish the solution for the office force. As for the worker himself, the placing of the box where it will be most convenient for him has already been emphasized. Choose a place where the worker can pick the magazines up on his way out at noon or at night, with room enough around the box to allow half a dozen people to stop, select, and chat as they turn the magazines over. One must actually see the workers reading the magazines noon times, instead of, as formerly, losing con- sistently at poker to the foremen, in order to appreciate the full benefits of the home reading box movement. It may seem surprising to see the workman carrying home two to four dollars' worth (in original cost) of magazines each week — reading suited to every member of the family. But there is really nothing strange about it. This is wThat he would always have done had he had the chance.
A second factor in maintenance is keeping the reading matter up to date. When the move- ment is first started, the workers will take any-
66 FATIGUE STUDY
thing home, out of interest or curiosity. In dis- tricts where there is little reading matter avail- able outside, they may continue to take home al- most anything put into the box. But with con- tinued reading they become more discriminating. This is, of course, exactly what is desired. Then the reading matter, to make the strongest appeal, must be timely. A morning paper is exciting in the morning, quite readable at noon, not im- possible at night. Except as practice in read- ing, it has little value the next morning. A May magazine issued in the middle of April is cur- rent literature through May 31st. It becomes a last month's magazine on June 1st. Any one enjoys carrying the magazine of the month about with him. It is a fact that most men, especially those who do not have many magazines, feel a little peculiar when seen reading an old maga- zine of current events: in public. They have the consciousness of conspicuousness that at least distracts the attention. No magazine that has pictures or stories or articles on travel, or any- thing that is interesting at any time, will go without a great circle of readers, but current events must be current in order to hold the at-
HOME READING BOX MOVEMENT 67
tention thoroughly. The workers will be glad, in the average plant, to get anything to read, but, if you want to keep them excited, send the magazine out the moment that you have finished with it at home, so that it will be this month's magazine. The strong preference for this month's magazine may not be founded upon wis- dom, but it is very human.
How the Conditions Vary.
The home reading box will prove a success in any plant, no matter how simple the installation and running plan are, but it can only retain its best results when a careful consideration is given to the conditions that affect the particular prob- lem. The important feature is, of course, the type of worker who is to receive the literature. Where the group of workers consists of foreign- ers, many of whom read no English, and speak it little, the picture magazines are the most sought. Where you have a group of highly skilled mechanics, technical magazines and trade catalogs are highly appreciated. There is such a great difference in the workers of any one place, that the rule is to give them anything
68 FATIGUE STUDY
and everything — from the Outlook to the Police Gazette, inclusive. If you give them enough to read, they will sooner or later waste none of their time on anything but the best. The desire for good reading is almost wholly a matter of educa- tion, and the best way to become educated is to ready ready read. If you are at a distance from civilization, old mgazines will be almost as wel- come as new.
You must realize that the problem is different in different cases. What some people need is general education. Of course, that is what we all need, but the worker in particular. What others need is specialized teaching. What still others need is relaxation. All need amusement and entertainment. We want, of course, to sup- ply what is interesting and profitable, but the final test is giving the worker the thing that will please him most, that he will delight to have, that he may increase his vocabulary and learn to read quickly, for not till then will he ac- quire the reading appetite and habit. Give the foreigner who reads with difficulty the pictures with the simple captions that he can " spell out." Give the factory girl the woman's magazine that
HOME READING BOX MOVEMENT 6d
will show her how to trim her hats and fix her dress, and that may give her all sorts of useful home ideas besides. Give the inventive me- chanic the technical and trade magazine that may supply the missing link in his invention or suggestion. Give the socialistic worker the " Political Economy Journal," that will put his ideas in more logical shape. Use discrimination in your distribution when you can, but, if you cannot, put the box in anyway, fill it with read- ing matter, and start something to-day.
The Home Reading Box and Fatigue.
Not only is the influence of the home reading box upon fatigue important, but the amount of fatigue existing has a strong influence upon the home reading box. The home reading box plays an important part in recovery from fatigue. It is a help to the worker during the time that he is not at work. It is the psychologist's task to investigate the relation of mental fatigue to bodily fatigue, and the proper amount of mental stimulus to prescribe or allow during the periods when the body is resting ; but it is good practice, while waiting the results of the psychologist's
70 FATIGUE STUDY
investigation to be formulated into industrial terms, to encourage the worker to read whatever he likes.
The By-products of the Home Reading Box Movement.
There are so many important results from the home reading box movement that it is difficult to decide which are the products and which are the by-products. Let us call the product the fatigue elimination for which we planned, and that results when we establish the home reading box movement. Along with this come the fol- lowing :
1. The recognition of fatigue elimination as a vital part of management. This is se- cured by numbering the box as a sta- tion, by using the " out " baskets as rout- ing channels, by having the messenger carry the magazines to the box from the baskets as part of the daily routine.
2. The education of the worker. Quite aside from the fact that the reading mat- ter interests, amuses, or rests him, the worker is educated by his reading. It
HOME READING BOX MOVEMENT 71
is this side of the movement that has most interested sociologists and educators. The chief trouble with the worker to-day is that he needs more and more educa- tion. The average worker has two ob- stacles. In the first place, he has a limited vocabulary that retards his speed in reading. In the second place, he can- not read educational matter fast enougli to hold his attention. Through the read- ing matter put at his disposal, he does learn more words, — both how to recog- nize them and how to use them. He thus becomes better able to express himself, as well as a more rapid reader. Of course this implies mental development. The worker who is better educated to start with also acquires more vocabulary and more speed. It may be a technical instead of a general vocabulary, but the development is the same. 3. The stimulation of invention. This takes place through the ideas obtained from the technical magazines and trade cata- logs. We have noted time and again
72 FATIGUE STUDY
men who have said, in effect, — "You know I got this idea from an article I read from the box ; " or, " You know I have had this idea for a long time, but I could not see exactly how to work it until I saw a picture in a magazine I got out of the Home Beading Box ; " or, again, " I saw a picture the other day that suggested something that we could use on my machine. I am going to turn in the suggestion to the Suggestion Box." The suggestion box and its use are to be described at length later.
4. The stimulus towards making suggestions for prizes. It is noted here that the read- ing not only stimulates the worker mak- ing suggestions, but gives him a chance to put his ideas into more practical and working shape. Where the Suggestion Box has been running some time before the Home Eeading Box has been put in, we note the sudden rise in the number of suggestions offered after the installa- tion of the Home Reading Box.
5. Co-operation with public and travelling
-r - — r - ~ -i | | i i^ ' - '--•-••
'UBLIC LIBRARY BRANCH
FOR USE OF ALL EMPLOYEES APPLYAT INFORMATION BUREAl
FIG. 4
The Public Library Branch at the New England Butt Company, rrovidence, R. I., for eliminating the necessity, and consequently the fatigue, of journeying to a regular Public Library.
HOME READING BOX MOVEMENT 73
libraries and other educational institu- tions. A plant library is becoming a reg- ular institution. It is usually one of the first things introduced by the welfare or betterment department. The problem is to make the workers take out the books. In some plants the management also buys books and starts a circulating library. In others, the public library sends a loan collection that is changed as often as the plant desires. Even in districts where there are no public libraries such books are available, as most of the States have State loan collections of this type. In a typical New England plant the librarian of the city was more than willing to co- operate. He asked the plant to supply a list of books which he should send. His letter was discussed in the foremen's meeting, and every member present helped by submitting a list of books that he had read and enjoyed most in his life. From these lists a list of fifty books was made up and sent to the librarian, who pronounced it the best list that he had
74 FATIGUE STUDY
ever seen. The books were promptly brought to the plant, and put in a con- venient place where every member of the organization could see the titles and bor- row them. The first book taken out by an Italian labourer was Dante's " Divine Comedy" in the original. But the li- brary at the plant is another story. The influence on the home reading box is to make the library much more popular and to affect markedly the books in greatest demand. There is a strong influence also seen upon the number of workers who attend evening school at the general even- ing school or some of the special evening schools in the vicinity. 6. The influence upon clubs and other or- ganizations. The home reading box fur- nishes also topics for discussion in all of the organization of members of the plant. This influence can be noted in foremen's meetings, in organization meet- ings, and in any formal or informal gathering of the organization. The in- fluence is seen in the topics discussed and
HOME READING BOX MOVEMENT 75
in the form and style of the discussion. The worker can speak with authority, if some magazine or catalog " backs up " his ideas. He can bring new light on the problem, if he has seen several views pre- sented in the material he has read. He has a definite suggestion, something to say when he is called upon, something to volunteer if he is not called upon. 7. The spirit of co-operation. Most impor- tant of all the spirit of co-operation is fostered, co-operation among the workers, co-operation of worker and manage- ment, co-operation between all interested in the movement as subscribers, as col- lectors, as readers, as " passers-on." As a positive force this spirit of co-operation is more valuable than anything else.
How to Begin.
Begin by interesting the management force and insuring a supply of reading matter. Then put up the box in the plant, and tell the men that whatever goes in it is at their disposal. If you have the right ideas back of it, the develop-
76 FATIGUE STUDY
ment is inevitable. Your motto must be " Keep the box full." The " how " will come to supply the need. The workers will see to keeping the box empty, if you do your part properly. The important thing is that the movement be started at once. It is not only an important part in making more pleasant the time spent in recover- ing from fatigue, but also an enormous help in fatigue elimination. It is to this that we must next turn our attention.
Summary.
The Home Reading Box Movement is a method of putting reading matter at the disposal of the worker. It collects this reading matter from the homes of those interested and from the desks of members of the organization who have finished with it, and places it in a box. The workers take it from this box to read either during noon rests or at home. The movement not only helps to overcome fatigue, but has many valuable by- products, and is an important element in fatigue elimination.
CHAPTEE V
PRELIMINARY FATIGUE ELIMINATION: WHAT
CAN BE DONE IMMEDIATELY, AT THE
VERY BEGINNING
The Lighting Problem.
It is not necessary to have a scientific knowl- edge of motion study, physiology, and psychol- ogy, or even of hygiene, in order to make pre- liminary, anti-fatigue improvements in working conditions of any industrial organization that has not already had a regular fatigue survey made. We might profitably begin with lighting, since no fatigue is more wearing than eye fa- tigue. We attempt here only to ask a few gen- eral questions about the light. " Is there enough light, so that every one can see his own work per- fectly?" "Is the light properly distributed?" " Is glare prevented? " Etc. Nearly all factory managers of to-day are careful to provide enough light for the worker. In their desire to furnish light enough, many workers often have more
77
78 FATIGUE STUDY
light than is really comfortable, and are forced to adjust their eyes constantly in order to see distinctly. The lighting to be found in most fac- tories is not properly distributed, and seldom strikes the work at the least fatiguing angle.
The greatest fatigue from lighting, however, lies in the question of glare and reflection. One sees examples of this everywhere. It is caused largely by a misplaced pride in equipment or machinery, and by keeping everything in a high state of polish. One is often disturbed and in- convenienced in even the best equipped public libraries by the glare of the electric lights upon the shiny, varnished, or otherwise highly polished surfaces of the desks. Oftentimes we see lights carefully placed so that the individual gets light enough with his light in the right location, while lights in the distance shine in his eyes. Even when the lights are provided with adjustable shades, it is almost impossible to place one's book in such a position that reflected light will not shine from the page to the eyes. The glare from nickel-plated machinery, be it a large factory machine or a typewriter, or any other kind of shop or office equipment, will cause fatigue, if
FATIGUE ELIMINATION 79
the eye is required to work constantly in the vi- cinity; but the source of fatigue is not recog- nized. A dull black finished machine may not be as beautiful either to manufacturer or pur- chaser as would be a shiny, nickel-plated machine of the same design, but the main question is, " How much comfort will the operator take while using the machine? " The kind of finish of such machinery is usually affected greatly, if not de- termined wholly, by the. question of salesman- ship. Good appearances have always been a large element in making sales, and it is natural and right that the manufacturer should like his product to be attractive in appearance, and that the manager should take pride in the looks of his factory or office. But our entire standard of what is desirable in " good looks " in a work place has changed. We look now for efficiency and fa- tigue elimination rather than for ornament and glaring polish. We reduced fatigue, annoyance, and distraction on several pieces of work by hav- ing our clients paint nickel and other bright parts with a coat of dull black paint. For the best results to the eye, the same finish as that on the inside of a camera is to be recommended.
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We are coming to realize more and more that the great test of everything is suitability, and that the mysterious and tangible thing called " suitability " simply consists of the measure of predetermined units of desired qualities. The operating room in the hospital is bare, with plain walls and rounded corners, with the least oppor- tunity for dust lodgment, because that is most suitable to the type of work done there. The modern business desk is flat topped, with no tiny drawers or cubby -holes to collect papers and mis- cellaneous odds and ends, because this type of desk conforms best with present day systems of office management. In the same way all machin- ery and office equipment should be without so- called ornament or polish, because in this way the most work can be done with the least amount of fatigue. Our whole idea of ornament is changing. Suitability here also is the standard, and the artists have done noble work in setting an example to the trades. " Suitability " must become a slogan for every department in the organization.
The new doctrine will interest the selling de- partment, who act as intermediaries between the
FIG. 5
This photograph shows a typical " motion-studied " desk. This desk is cross-sectioned, so that standards can be made as to the placing of those things that are constantly re- quired for work. The only drawer containing any per- manent materials is pulled out at the left. It contains duplicate supplies of our standard forms, so arranged that a man will not run out of supplies at his desk, as the holder in which the reserve supply is placed is a notification to the desk supply boy that supplies in addition to the weekly furnishings are wanted immediately.
FIG. 6
This picture shows a "one-motion" pencil rack. This is one of the many little devices that we have used to cause every one throughout the plant to think in terms of elementary and least fatiguing motions. This pencil rack was devised little by little, suggestions coming from dif- ferent employees. For example, one suggestion was that the grooves be painted different colours, representing the standardized places for the different coloured pencils. An- other suggestion was that a deep horizontal groove be added, that the fingers might go around the pencil at the exact place where used when in the position of writing. The slant of the rack is that slant whereby the -pencil will surely slide down by gravity to the stop at the bottom of the pencil rack, but not slide with force enough to break even the most delicate point.
Such a device alone saves very little time or fatigue, but it represents one of many kinds of devices that make for habits that cause less fatigue.
FATIGUE ELIMINATION 81
manufacturing department and the public who is to buy the product. It will be a real part of the preliminary work in adjusting such conditions as lighting to take the sales department and pur- chasing department into conference on the sub- ject. Let all interested see that nothing comes into or goes out of the plant until the question, " What is its relation to fatigue? " has been con- sidered. We forget sometimes that a thing may have value not only because it has certain quali- ties that eliminate fatigue, but also because it lacks certain qualities that would cause fatigue. Go, then, through your own plant with the question of glare in your mind. Examine and inspect every work place, and see what can be done. Not only for reasons of glare, but for other reasons we recommend that every work place should be inspected for unnecessary fatigue by having a man, competent in fatigue study, actually sit and stand in the working position in each and every work place in the establishment once every three months during the installation period, and not seldomer than once per year thereafter. Sometimes it will be found that mov- ing the nearest light or shading a distant light
82 FATIGUE STUDY
will be all that is necessary. Sometimes a coat- ing of dull black paint on some of the working equipment is required; sometimes the substitu- tion of a dull-finished for a glossy paper. Some- times dull-coloured blotting paper can be laid upon the place where the reflected glare comes. Perhaps a dull finish upon that would not only save the time of your workers, but also those who are to use the product after it leaves your hands. The world worked a great many years under the motto, " Give the public what it wants." We are beginning to realize to-day that the public will want just exactly what it is educated to want; also that the public is easily educated if the ar- guments that are used are based upon measure- ment, and are presented in attractive form. The lighting problem is but a small element of the problem of eye fatigue. This will, however, be left for later consideration.
The Heating, Cooling, and Ventilating Problem.
This problem has to do with different aspects of seeing that the worker is provided with proper air. We are beginning to realize that the air problem is much more complicated than was for-
FATIGUE ELIMINATION S3
merly thought. Recent investigations have gone to prove that the temperature of the air is fully as important as the supply of air, and that hu- midity is another important element. In this day no one can feel satisfied with his solution of the air problem who has not submitted it to an expert, and installed the results of his measured investigation. In the meantime, safety lies on the side of providing more fresh air than is neces- sary. If there is plenty of fresh air, unless the work itself demands peculiar temperature or hu- midity conditions, the worker is fairly safe. The rest periods that are being installed will do much to solve the air problem, as they furnish an ad- mirable opportunity for giving the work places a thorough ventilation, if not a complete " airing out." This is not in the least to underestimate the importance of proper temperature and of proper humidity, as will be noted later. All measured records of outputs should include rec- ords of the temperature and the humidity. The accumulation of this data is daily bringing nearer the time when standards covering these will be available. In the meantime, give the worker plenty of fresh air all the time.
84 FATIGUE STUDY
Fire Protection.
•
The average manager to-day realizes fully the necessity for fire protection. It is not, perhaps, so fully realized that the mere knowledge that there is adequate fire protection has a consider- able effect upon the mental comfort of many of the workers. Nothing is more fatiguing than worry. When each worker in the establishment knows that in case of a fire he can leave the building with speed and perfect safety, he has absolutely no worry or distraction from the fire standpoint.
Fire protection should include not only seeing that the building and all it contains are made as ^re-proof as possible, and installing all possible devices for putting out a fire should one start, ^ but also the fire drill. Here the motto of the Boy Scouts is useful, " Be prepared." There is noth- ing so satisfactory as preparedness. The fire drill is not only a means of handling the organi- zation during a fire, but it is also a splendid preparation for meeting an emergency. The great problem that arises in any unexpected situ- ation is the problem of making a decision. If
FATIGUE ELIMINATION 85
one can acquire the habit of making a decision quickly, and can also make habitual certain de- cisions in certain situations, the resulting speed and fatigue elimination is remarkable. Make the response to the fire situation, then, standard. You will be benefiting your workers not only by teaching them how to act in any fire anywhere, but also by teaching them how to respond to a signal in a standard way. These various sets of habits in response to various stimuli should be formed in the first years of the school life, if not before. They are being formed at this time to-day to a greater extent than ever before, but unfortunately the majority of adult workers in the industries have never had such training as children. It, therefore, becomes the duty of the management to form such habits as rapidly as possible.
Safety Protection.
Safety protection in its broadest sense covers not only protection from grave dangers, but from anything that might have a harmful effect upon the worker's body or mind. The standard to be set is that everything should be safe not only
86 FATIGUE STUDY
>x4
when the work is done by experienced adult work- ers, but even should it be done by inexperienced, immature or tired workers. We know how many ^accidents happen to the inexperienced worker, that would never happen to the experienced worker. We all know how many children are hurt, where an older person would see and avoid danger; and we note every day, more and more clearly, that the exhausted worker is to an enormous extent more susceptible to accidents than is the rested worker. It is usually the tired motorman who has the collision. The tired loco- motive engineer passes the stop signal. The ex- hausted motorist is in the accident. The tired operator gets his fingers caught in the machine. The overtired sickroom attendant gives the wrong medicine.
One side of the fatigue elimination question is that fatigue elimination cuts down accidents. The other side is that cutting out the chance of accidents eliminates fatigue. Here again the question of worry is an important element. If one knows that the working conditions are abso- lutely safe, he can concentrate his attention upon the work in hand.
FATIGUE ELIMINATION 87
It is coming to be understood not only that it is mandatory that working conditions be made healthful, but also that it is perfectly possible, and, in most cases, easy to make such conditions healthful.
Look over your conditions, then. Put the proper safety devices on the machine, the tools, etc. Install the vacuum cleaners that will col- lect the dust and lint. Put the goggles or nos- tril-guard, or other device, on the worker, that will insure to him clean air and decent working conditions. Make a scientific attack upon the problem later, but put in a safety device now, even if you have to change some of it next week. You will gain the immediate return that will make the investigation pay from every stand- point in the changed attitude of your workers, if in nothing else. The Museum of Safety Devices, with its energetic and enthusiastic secretary, will show you what has been done and what can be done in the line of safety. " Safety First " has become the slogan of the day. If we make it " Safety First, beginning now," we shall have full working directions.
88 FATIGUE STUDY
The Work Place.
The working conditions that we have so far discussed have more or less effect upon all of the workers in a group. We come next to the in- spection of the work place of each individual worker. The first consideration here is that he have room enough in which to work. There is an enormous amount of fatigue involved in doing work in an overcrowded work place, yet few workers or managers realize this. Again, habit is involved here, and the habit of order demands I1 that the work place be kept in an orderly condi- tion. Any one who has walked through facto- ries, shops, or any places where work is going on must have noted the tired appearance of the workers among what is called "clutter." The girl selling ribbon, who walks up and down be- hind the counter through an accumulation of paper, cardboard cores, and other odds and ends, has not only the bodily fatigue of pushing the clutter ahead, or kicking it aside, but also the mental fatigue that comes from adjusting herself constantly to such conditions. The folder of cloth, who has barely enough room to move her
FATIGUE ELIMINATION 89
hands because of the supply of finished and un- finished materials, is fatigued from the clumsy position, even though she and no one else realizes this. The office worker, whose finished and un- finished papers are heaped in confusion before Mm, expends not only useless motions in getting at and disposing of what he wishes to handle, but also mental energy, in constantly adjusting and readjusting himself to the work. There has been a popular idea that it " looked busy " to have plenty of work around, that to see work to be done would impress both managers and work- ers with the need for applying themselves to the work more constantly and with considerably more speed. This may be true if the work is ar- ranged in an orderly fashion, but disorderly work is far more likely to discourage than to stimulate the worker. As for completed work, there is no excuse for leaving large quantities of it at the work place one moment longer than is absolutely necessary. Any encouragement that it might give the worker could better be given by a record of what he has done.
90 FATIGUE STUDY
The Work-bench or Table.
Few work-benches or tables should be consid- ered as absolutely satisfactory that do not per- mit the worker to do his work standing or sitting.- Our ideas as to proper work-benches or tables, as to the proper placing, height, etc., of ma- chinery and tools have too often been prescribed to us by the manufacturers of the articles, who have thought more of what was convenient to manufacture than of what was least fatiguing to use. Such manufacturers are not to be blamed in the least for their attitude. They, naturally, have been guided by what would sell best. They have, as a rule, shown themselves more than willing to supply any legitimate demand. The user must demand what will be best for his work. It is no slight, short-time job to determine the proper height, positioning, and layout of a work- bench, using this term in a general sense to cover the place of any kind of work upon which the worker is engaged. As preliminary work, we may, usually, then, boost everything that can be so lifted to such a height that the worker, at his option, may stand or sit. If it becomes a case
FIG. 7
This picture shows 'the "Gilbreth" table laid down in its lower position. This table is particularly adapted for a work-bench or table where it is desired to have two dif- ferent heights for different kinds of work. The table and its load can be picked up with a booster truck in either this position or the higher position simply by operating the lever of the booster truck and without touching the table at all.
FIG. 8
This picture shows the " Gilbreth " table standing in its higher position.
FIG. 9
This is a sample of photographs that are taken to im- press upon the foreman the reasons why certain methods are wrong. For example, this picture shows two "Gil- breth " tables resting on their long side at their low height, so fixed that they can be picked up by "booster" trucks. The in-and-out bins are not the same size. The outward one is considerably too high to be convenient for the worker, and the worker is provided with a box instead of a com- fortable stool.
FIG. 7
FIG. 8
FIG. 9
FATIGUE ELIMINATION 91
of single choice, that is, his either standing or sitting, arrange the work so that he does it sit- ting, and does the necessary standing or moving about during his rest periods.
The change in industrial conditions has made this problem important. The question once was, " Can we make it of a quality that will pass? " Since the day of intensive outputs, the question has become, " How many can wre make of a given quality? " In the first case, any kind of work- bench was good enough, — the worry being lim- ited to the question of " Can we make it? " Now it is no trouble to make almost anything ; but the worry is " Can we make enough so that the cost will enable us to pay the required wages and still compete, or must we give up manufacturing in this location? " This makes us think of the least fatiguing conditions and of making work-benches of two levels, etc.
The Chair or Other Fatigue-Eliminating Device.
Closely related with the work place is the work chair. It is distinct from the rest chair in that it is specially devised to be used during work periods. The ideal work chair is of such a
92 FATIGUE STUDY
height that the worker's elbows will bear the same relation to the work place when he is sitting as they would if the work place were properly adjusted for him to do standing work. Types of chairs that have been designed and that are prov- ing effective in eliminating fatigue while at work will be described more at length in the next chapter. The important point to be considered here is to adjust the work to the worker if possi- ble. Where this is not possible, immediately, adjust the worker as best you can to the work. Make the relation of his elbows to the work the deciding point. If at present the work must be done standing, and the worker is too small, and it is easier to raise the worker than lower the work-bench or table, provide some sort of a stand or platform that will put him at the proper level. If he is large, raise the work-bench by lengthen- ing the legs, or adding a false top, or, in some rare cases, by lowering the standing place. If the work is seated work, adjusting the chair will probably be the simplest change to make. Arm rests often afford an immediate and immense re- lief, but must fit the particular arm and be ad- justable for best results. A head-rest may also
FIG. 10
Very few people realize that the working girl should be measured for her working chair in which she spends one- half of the time that she is awake during her entire work- ing life. For this purpose we have had testing chairs of varying heights made for the girls to sit in, and then have made a chair for each girl, particularly adapted to her and her work. The correct height of chair is determined much quicker and fits much more accurately than does an adjust- able chair.
FIG. 11
This picture shows a worker seated at standing height operating a drill press. The pieces arrive in his inward box by means of a small belt conveyor that transports finished pieces from the machine that performs the previous operation.
FIG. 10
FIG. 11
FATIGUE ELIMINATION 93
be a valuable first aid, though often a later im- provement in working methods will eliminate so much eye and head fatigue that the head-rest will not be needed. In other types of work, the foot* j rest will often do the most immediate good. If every manager were made to sit for a certain num- ber of hours to-day with his feet hanging, there would be an enormous increase in the number of foot rests in our industrial plants to-morrow morning.
Placing the Material Worked On.
In cases where it is difficult to readjust the work place, much fatigue may often be elimi- nated by placing the work in a better position, i In fact this aspect of the problem should always be considered along with the readjustment of the work itself. For example, in folding handker- chiefs, a folder may be seated at a table, folding directly on the table. The table may be too low for the work. If she is given a board upon which to fold, this may not only put her work itself at the proper height, but it is also possible, with trifling added expense, to provide her with a table in two adjoining sections at two different
94 FATIGUE STUDY
heights, and a sloping board that will make the work less fatiguing, as she can maintain a much better posture. She will also be enabled to put the finished product at a lower level. This will increase speed, while at the same time eliminat- ing fatigue, which is, of course, an ideal condi- tion.
In considering the placing of materials, we must consider also the manner in which the ma- terials come to the worker and in which they xJleave him. Our later method study will make so many changes here that only very apparent, nec- essary, and inexpensive improvements should be made at this stage. Be sure, however, that you are using gravity wherever it can be used to ad- vantage. Often we have found a small belt con- veyor to be helpful in cutting down the hand transportation.
The Placing of Tools and Devices.
Gravity and mechanical means can be of use here, especially in carrying working equipment back to the place where it remains when not in use. Many preliminary improvements can also be made by standardizing the place where the
FATIGUE ELIMINATION 95
tool is to be left when not in use. There is not only the bodily fatigue of bringing the tool from a more distant place than is necessary, there is also the unconscious fatigue of constantly decid- ing such unimportant questions as where it is to be placed.
The Clothing of the Worker.
In an excellent series of articles on dress, pub- lished some years ago, Miss Tarbell laid down the rule that " suitability " is the final test of a costume. It is with this in mind that the cloth- ing worn by the members of the organization while at work should be examined. It must be said, in the first place, that there is no more rea- son for the common custom of the worker pro- viding his special outer clothing while at work than there is for his providing his other tools and equipment. In other times, the workmen of many trades preferred to provide their own tools, and did so, but in a scientifically managed plant to-day, the workers are provided by the management with standard tools. The man- agement has standardized the best in a tool, and keeps it in the best possible working condition.
96 FATIGUE STUDY
In the same way, it should be the duty of the management to provide special working clothes, when they have been standardized. This in- volves, of course, the problem of laundering, which may seem complicated to one who is not acquainted with what has been done in this field. There has been very little done in most kinds of work to provide a costume, designed to con- ^ form to motion economy and least fatigue, that is, at the same time, useful, artistic, and pleas- ing. Progress has been rendered even slower by the fact that many workers have a prejudice against such garments, feeling that they show a class distinction. All that is necessary is to create a fashion of wearing such garments, like the fashion of wearing atelier or studio clothes. In no place can an example of unsuitable clothing be more clearly seen than in the laundry industry. Much of the work done in the typical laundry is done while standing, and the women who form a majority of the workers wear clothes, and par- ticularly shoes that make the work far more fa- tiguing than it need be. Yet in this very indus- try some of the most progressive work to im- prove conditions is being done. In Europe a
FATIGUE ELIMINATION 97
shoe with a thick wooden sole and a heavy leather upper over the front part of the foot only is considered the most comfortable and least fatiguing. It is also certainly the cheapest and most durable. But Americans will not wear such a shoe. The shoe furnishes the most diffi- cult feature of the costume problem. Here again the most important thing is that the " fashion " of wearing comfortable and efficient garments shall be set. We have hoped for years that sensible fashions in workers' clothes might be set by patterning after tennis or other athletic costumes, but the time when this will become general seems as yet far distant, due to the neces- sity of the worker using his oldest and discarded " dress up " clothes, ultimately for his working clothes. Nevertheless, the great loss in effi- cency, due to the general custom of wearing clothes that interfere with comfortable work, and that cause unnecessary fatigue, has caused us to start a campaign for the design and standardization of more suitable clothes. As yet we have had but few designs submitted in answer to our appeal to the worker to study the clothes problem for himself or herself. We are
9& FATIGUE STUDY
making the same appeal to the management to suggest costumes for the approval of the worker. In order that there may be no duplication, that we may pass on good ideas, we have started a lit- tle museum where typical fatigue-eliminating devices of all sorts may be gathered, and studied by any one interested. We must next describe in some detail what is and what is not as yet there, in order to offer definite suggestions for preliminary fatigue-eliminating designs that can be used from the first day of making changes.
Summary.
/ Preliminary fatigue elimination consists of
improving lighting, heating, ventilation, fire and | safety protection. It also consists of improv- jing work places and work tables, of providing ? and improving chairs, and rearranging materials r and tools, and studying the clothing of the I worker. It aims to make immediate inexpensive
changes before entering into an intensive study
of the problem.
CHAPTER VI
THE FATIGUE MUSEUM: AN OBJECT LESSON
What a Fatigue Museum Is.
A fatigue museum is a collection of devices for and information concerning the elimination of fatigue, or for affording rest for overcoming fatigue. Its purpose is to serve as an object les- son as to how the fatigue problem may be ap- proached practically. It aims primarily not to show beautiful exhibits, but to show devices which have actually done service. Many of these bear the marks of clumsy workmanship and hurried and cheap construction. This is an advantage rather than a disadvantage. It shows that fatigue elimination does not demand a large expenditure of money, nor depend upon having at the beck and call highly skilled me- chanics to make the devices. Some of the ex- hibits have the excellent finish and the careful workmanship of the perfect product; but no
99
100 FATIGUE STUDY
chair or piece of equipment, photograph, or drawing is too rough or too unfinished to find a place in the museum, if it contains an idea that actually may be utilized to eliminate or overcome fatigue.
The Parent Fatigue Museum.
The parent fatigue museum is in Providence, Rhode Island, and was started by us some years ago with five devices, — three chairs and two de- vices for conveying material. It has grown very slowly, and even now comprises but a dozen devices and a few score of photographs. It is open every day of the year, free for inspection by visitors. Most of the devices submitted and ex- hibited have not been patented. The Fatigue Museum patents no devices, has no commercial interest at all in the devices exhibited, but it accepts fatigue eliminating exhibits of any kind from inventors or managers, and posts, along with the exhibit and the description of its special features, the name of the inventor and his ad- dress; this, that any one interested may get in touch with the maker of any devices already in existence. Realizing that few find it possible to
THE FATIGUE MUSEUM 101
visit the museum, we have taken photographs of the various exhibits, and are glad to send these with descriptions to any who are inter- ested, and who write to ask for them.
We find that the interest in the museum grows. Branch museums are springing up in different parts of the country. Every man at the second _ session of our Summer School of Measured Functional Management, which consisted of professors of psychology, engineering, and eco- nomics, volunteered to open a branch at his college. We are glad to have others who are interested, no matter what their field of activity, start branches also. All that is necessary to open a branch is to collect photographs, draw- ings, or actual examples of fatigue eliminating devices. Some of the college fatigue museums have consisted, until now, simply of such collec- tions, though one college in particular has ap- propriated one hundred dollars, and is provid- _ ing space for the exhibition of working models.
The parent museum is called Museum of De- vices for Eliminating Unnecessary Fatigue, Number One, and the branch museums are num- bered chronologically. There is no reason why
102 FATIGUE STUDY
such museums should not be started in every fac- tory, as well as in every college, and we are de- lighted to co-operate with any one who desires to start such a museum.
What the Fatigue Museum Contains.
The fatigue museum contains, at the present time, types of chairs, types of devices which hold working material in a convenient position, sev- eral assembly devices, several transportation de- vices, a work apron, and various drawings and photographs. It emphasizes, particularly, the chairs, as we feel that these are needed immedi- ately and pressingly in all industries. A de- tailed description of the chairs will, perhaps, prove of most interest.
What the Museum Does Not Contain.
The museum contains, as yet, few exhibits, though we are expecting more in the near future. We are constantly impressed with the fact that it contains so few exhibits; this, in spite of the fact that we have sent out appeals since 1913, that have reached large numbers of people.
A short time ago we realized that the average
THE FATIGUE MUSEUM 103
manufacturer had never thought of his work in terms of fatigue. We could, therefore, expect no fatigue eliminating devices, as he either had none to offer, or as he did not realize what he had. Again and again, a manager will say, in effect, " I am much interested in your museum, and should like to send you something, but we have never given much thought to the subject of fatigue elimination, and therefore, unfortu- nately, we have nothing that we can send." In many such cases, if we go through the plant, or the factory, or the store, we find fatigue elimi- nating devices, and immediately say, " There, that is just what we want." Whereupon the manager replies, " Oh, that. Sure enough it does eliminate fatigue. I had never thought of it in that light. We have always had that." Within the next few days we add a specimen to our collection.
We have, perhaps, not sufficiently emphasized the fact that eliminating fatigue means not only that we know the things that we lack, but also that we appreciate and fully utilize the things that we have. It is good practice to use what is on hand before laying in new devices.
104 FATIGUE STUDY
is waiting space, then, in the museum for any sort of device, old or new, well-known or not known at all, that does, or will, or may eliminate or overcome fatigue. There is an especially warm welcome awaiting any such type of stool or chair. The older and more worn it is the better, if it is still in working condition. There is a chance to be a pioneer by exhibiting cloth- ing that is artistic, inexpensive, and appropriate for doing any type of work with less fatigue.
Types of Chairs and Their Uses.
We are fortunate in that, of the nine chairs exhibited, each represents quite a different type. This illustrates the large field for chairs.
Chair No. 1 is designed for work to be done standing or sitting. This is the ideal fatigue eliminating chair, as it allows of the most scien- tific distribution of work and rest periods, and for the greatest variation in working periods. The work for which this chair was devised was the folding of handkerchiefs, work that had al- ways been done sitting. This chair is the result of accurate measurement, and is of exactly that height that will permit the girl's elbows to be
FIG. 12
This chair is of type one, devised for doing work that has always been considered sitting work, either standing or sitting. In this case an ordinary chair has been boosted so that a worker can sit at a work-bench made exactly the right height for standing work. The chair is provided with ball-bearing casters, so that it can be pushed out of the way or pulled into position with little effort. This de- vice helped make it possible to divide each hour into work periods and rest periods ; and at the same time into standing and sitting periods, — thus not only eliminating unnecessary fatigue, but providing an efficient means for recovery from necessary fatigue.
FIG. 13
This chair is of type two, devised for doing work that has always been considered standing work, either standing or sitting. By its use, heavy filing can be done with greater ease and with the same speed and efficiency. The chair is inexpensive and easy to construct, and is of such a height as best suits the individual worker.
FIG. 14
Another view of the chair as shown in Fig. 13. The pro- jecting foot-rest on this chair enables a man to push the file as efficiently and more comfortably seated than standing.
THE FATIGUE MUSEUM 105
at the same distance from the work table when she is seated as when she is standing. The back of the chair, like the backs of all chairs designed for eliminating fatigue while working, is de- signed for work and not for rest. The chair is provided with dome casters, which allow of its being pushed away, or drawn back into position with the least amount of time and effort possible. The worker on this chair has a foot-rest which is a part of the working table.
Chair No. 2 is devised in order that a kind of work which has always been done standing may be done sitting. The work is heavy filing done at a vise, and the chair is provided with a pro- jecting foot-rest. The work-bench is of such a height that the man may work either standing or sitting. In actual practice the filer works half of the time sitting, and half of the time standing.
Chair No. 3 is designed to eliminate vibration of floors that carry much high-speed machinery. An ordinary chair is provided with springs, that relieve the operator of one hundred per cent, of the vibration of the floor. This chair was de- signed for work at a machine, and the operator is provided with a foot-rest, which rests on felt
106 FATIGUE STUDY
to kill the vibration. Note also the verandas on two sides of the chair for foot-rests.
The fourth type of chair is also a shock ab- sorbing chair, which is more complicated in its construction.
The fifth type of chair is designed for school work, and has a rest for the right arm that may be lowered or put in place.
The sixth type of chair is a modification of a chair already in use. A chair which was once, perhaps, fairly comfortable has become worn off from years of usa This is rectified by boring holes in four small blocks of wood, and fitting them to the legs of the chair, which brings the chair back to its originally desired height. A well-known Middle West manufacturer used iron piping for the same purpose as the four blocks of wood. This is, in some cases, easier to se- cure, although not so good for the shop flooring.
A seventh type of chair is an adjustable, tele- scopic stool, which the inventor claims is adapt- able to both factory and office work. This is ad- mirable in that it allows of the chair being adapted to some degree to its user at the expendi- ture of little time or money.
FIG. 15 A worker using the filer's chair, shown in figures 13 and 14.
FIG. 16
This chair is of type three, designed to eliminate fatigue from surrounding conditions. An ordinary chair, which was fairly useful and comfortable, was provided with springs that relieved the operator of 100 per cent, of the vibration of the floor. It is to be noted that the device attached to the chair is extremely simple and inexpensive, while at the same time it solves a problem that has always been rated as most difficult.
FIG. 13
FIG. 16
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The eighth type of chair is devised for rest periods. We have two examples of this. One is a small folding stool contributed by a local drygoods merchant, much interested in fatigue elimination, who, as a result of our fatigue eliminating campaign, has installed many of these stools in his large store. The other is a more complicated chair with adjustable seat and back. This is designed not only for causing least possible fatigue, but also in the interests of correct posture of the user.
Four of the chairs show particularly what can be done with little expenditure of time or money. Only the filing chair is a " new " chair, in the sense of the entire chair having been made especially with the idea of fatigue elimination. The other three chairs consist of chairs already in use, supplied with cheap adjustments, made of material already at hand. These may impress the reader as extremely inartistic. This they undoubtedly are, but these are chairs of the transitional period, made to better working con- ditions immediately, and to be used until stand- ard methods are introduced, and new stand- ard fatigue eliminating devices substituted. It
108 FATIGUE STUDY
must also be noted that three out of the four chairs are provided with what are practically footstools, although only one is shown in the pic- ture, as only one is attached to the chair itself. The fourth chair allows of the feet being placed comfortably on the floor.
Other Fatigue Eliminating Devices.
The other fatigue eliminating devices exhibited are useful more as suggestions than as object les- sons./ There are various type of packets upon *wnich materials are so placed as to be most handy to the worker. These packets are filled by un- skilled, that is to say, young, or inexperienced, learning or unskilled workers in such a way that the material can be removed from the packet by the high-priced man with the least amount of effort possible. Filling the assembly packet is an excellent training to the unskilled worker, as will be shown later. One of these packets is con- tributed by a local manufacturer of cotton cloth.
The other devices for holding materials in po- sition consist of two devices for holding motion picture films in position so that they may be studied with the least amount of effort possible.
FIG. 17
These chairs are of type four, devised to relieve fatigue caused by vibration. Besides the chairs, foot-rests were devised to hold the feet without any vibration from the floor; and, also, special treadles.
FIG. 18
This chair is of type six, which modifies a device already in use, so that it will become a more efficient device for eliminating fatigue. The chair shown was, ordinarily, fairly comfortable, but the legs had become worn with time. It has, as shown, been raised to that height which is most comfortable for the worker. The work-bench, in this case, could not be raised so that the work could be done either standing or sitting. The problem was to have the sitting work done with the least unnecessary fatigue possible.
THE FATIGUE MUSEUM 109
The transportation devices illustrate the prin- ciple of gravity, and also the principle of con- stant and careful adjustment of the transporta- tion to the worker.
How to Use the Devices.
The devices of the fatigue museum are useful rather as suggesting devices than as object les- sons. If your problem is to enable seated work to be done standing, raise your work-bench to the standing level, and put your work chair on stilts with casters, provided the work is not of a kind that requires a chair against which one can push. If your problem is to enable work that has been done standing to be done sitting, construct a chair that will bring the worker to the desired height. If your problem is to reduce vibration, put springs under the four legs of your chair. If your problem is simply to make sitting work more comfortable, be sure that the chair is of the proper height ; that the seat slopes right and has a rounded front edge ; and that, if it has a back, it is one that does not interfere with work. If the chair is too high, saw off the legs ; if too low, add wooden blocks. Chairs of this type, as actu-
110 FATIGUE STUDY
ally used by the workers, will usually offer sug- gestions as to what needs to be done.
In many factories one is astounded to find books, cardboard, cloth, blocks of wood, almost anything heaped in the seat of a chair to make the chair higher. Wherever workers are seated at a work-bench that is not adjustable, look for trouble with the chairs ; that is, a tall girl crouch- ing in a kindergarten chair fit only for a child or a dwarf, a short girl balanced on a high stool at a high table, without a proper place to rest the feet. No matter what the height of the table or the chairs, if many workers are seated at the same table, and the chairs are not adjustable, there is field for study. If workers vary much as to height, they should be sorted for height, and sent to tables with adjustable height legs; or, if workers cannot be sorted, the short ones should be provided with platforms to bring their elbows to the right height to fit the table, which should be adjusted to fit the tall workers. If your problem is to make standing work more comfortable, and a chair seems impracticable with the methods used, perhaps a chair or some kind of seat could be provided for rest periods.
THE FATIGUE MUSEUM 111
Starting Your Own Fatigue Museum.
We advise every employer to set aside a small space and assemble at least one example of each type of fatigue eliminating device actually in use, or that may suggest a device to be used. In the absence of a regular motion study man assigned for the purpose, the ideal state of affairs would be to have every member of the management walk through the factory once and look at present fa- tigue conditions in order to see what improve- ments could be made. This, however, is almost too Utopian to hope for.
It is the exception where the worker in any large plant knows intimately any part of the plant except the few little work places where he has toiled. A girl who had worked for years in a cotton mill, and who finally went into house- hold work, begged to be taken on a visit of in- spection to the factory. " But," said the woman who was to make the inspection, " I thought you worked there. Surely, you must know about the factory." " No, indeed/' said the girl, " I never went anywhere except to get into the room where the machine was that I tended." Even in one
112 FATIGUE STUDY
excellently managed plant where welfare, or bet- terment, is a prime consideration, a girl in the office department had never once been out into the plant itself/There is an enormous amount /TJf ^ucaHonal work, that is also fatigue elimi- nating work, to be done in putting each member of the organization in touch with the entire work- ing plant. There is not time or space, however, for an extended discussion of this problem here. Therefore, until the workers can be taken to see the fatigue eliminating devices in actual operation, collect such devices, or photographs of them, and put them all in one place. Start a little fatigue museum of your own, even if it is limited to a properly labelled scrap-book of pictures always ready for inspection, and observe the effect upon management, workers, and in- vention in general. This effect will be reflected in the suggestion box, which in itself provides a unit of measurement of the progress of the fa- tigue eliminating campaign. When fatigue elim- ination has progressed to this stage, when actual devices are being installed, when the entire or- ganization has come, as it will, to think in terms of fatigue elimination, the problem may be at-
THE FATIGUE MUSEUM 113
tacked scientifically. This, the scientific elimi- nation of unnecessary fatigue, is the subject for discussion in the next chapters.
Summary.
A fatigue museum is a collection of devices for eliminating or overcoming fatigue. The parent museum in Providence aims to exhibit such de- vices as object lessons, and to encourage the spread of fatigue study by sending photographs with descriptions to all who are interested enough to start museums or even a scrap-book for pictures of devices for the elimination of un- necessary fatigue in the industries. Our fatigue museum specializes on chairs, but welcomes de- vices of any kind. It advocates the establish- ment of similar museums in colleges, or other in- stitutions, and also in industrial plants and work places of all kinds.
CHAPTER VII
FATIGUE MEASUREMENT AND FATIGUE ELIMINA-
NATION : HOW TO ATTACK THE PROBLEM
SCIENTIFICALLY
History of Fatigue Measurement.
Accurate fatigue measurement is in its infancy as applied to the industries. Such measurement can take place only where there is complete co- operation between the man measured and the man making the measurements. With the co- Operation, that is the natural result of measured functional management, comes the possibility of making accurate measurements of fatigue under either laboratory or shop conditions. It is as easy to pretend to be tired as to pretend to be \ working. There is little or no profit in measur- ing pretended states. Under the scientific form of management there is no incentive to pretend anything. The incentive is, rather, to show ex- actly what one is doing and how one feels, in
114
FATIGUE MEASUREMENT 115
order that accurate records may be made, and that the offered rewards may be received. We have, then, at this stage, where every member of the organization realizes that co-operation is nec- essary for the good of all, the opportunity to measure fatigue with considerable accuracy.
We have also the means. The psychologists ; and physiologists who have measured fatigue rely almost solely upon output as the unit of meas- urement. Decrease in output in a comparable unit of time, and all other working conditions remaining the same, is taken as indicative of being the result of fatigue. The observed man who is measured may add introspections, he may tell how he feels while working and at the close of work; but this testimony of his, while inter- esting and worthy to be recorded with the other data, cannot be submitted to the accurate meas- urement of the observer. In applying fatigue measurement to the industries in the same way that we measure activity and what it produces, we try to discover at the same time the condition of the worker by his own accounts as to how he feels. We have not only conditions under which scientific observations can be made and a method
116 FATIGUE STUDY
of making them, we have also devices for meas- uring both activity and output and relative rate of output.
Fatigue, a Test of Efficient Activity.
As for the relation between fatigue and activ- ity, practically all of our knowledge of fatigue is derived from our knowledge of the activity that produces it. We measure the activity itself, and its product. We then measure the interval of time that elapses before the organism has gained enough activity to perform the same work in the same amount of time and with the same results. A study such as this cannot extend over a short space of time only. It must be carried on until any fatigue that is accumulated shows itself ; but it is simply a question of extending the time over which the experiment stretches, and of varying the length of rest periods until the de- sired information is recorded in the data. As we come to compare various activities and their re- sults, we find that the fatigue is a measurement of the efficiency of the activity. If two methods of doing the same piece of work take the same amount of time and produce the same amount of
FATIGUE MEASUREMENT 117
output, and if the interval needed to recover from the second is longer than that needed to recover from the first, then, other conditions being equal, the first method is the more efficient. A close study of the variables that affect the two meth- ods will be necessary to show exactly why the first method is more efficient than the second, but the excess fatigue certainly shows that it is more efficient.
Fatigue can, then, be looked at in two ways :
1. As a product of doing work.
2. As a test of efficiency in doing work. The amount of work done and the product are
affected by various elements which affect the ac- tivity.
The Activity.
The activity is affected by the amount of prac- tice that one has had. It is affected by the ex- tent to which the action has become a habit. It is affected by the degree with which one has got into the swing of the work. This may be an in- dividual difference. Some workers find it possi- ble to start at work at very much the pace that they will use when they are well into it. A large
118 FATIGUE STUDY
number of our records shows that most workers never get into the swing at the beginning of a work period. Not only the hour of the workday, but the time in the work period will have a strong effect upon the amount of work turned out. Again we have the question of spurt, when for some reason or other the activity is being per- formed at a pace that is above the normal pace. The effect of all these elements of the activity upon the fatigue itself depends upon the relation between mental fatigue and bodily fatigue. This relationship must be worked out by psychologists and physiologists. It is for the observer who measures fatigue in the industries to attempt to discover, as far as he can, what fatigue exists, and why it exists, and then to make both physical and mental conditions under which the activity is carried on as favorable to efficient activity as possible.
Motion Study, Micromotion Study, the Cycle- graph, and the Chronocyclegraph Method as Measurers of Activity.
We measure activity in two ways :
1. By motion study, which records in great detail the methods used in doing the work.
FIG. 19
This picture shows the examination of the original micro- motion films at the motion study laboratory of the New England Butt Company.
FIG. 19
FATIGUE MEASUREMENT
2. By records of outputs when using the va- rious methods.
NtAM
Motion study consists of dividing the activity into the smallest units possible, measuring the variables of these units, studying the data, and deducing methods by which the activity may ex- press itself more efficiently. Motion study, what- ever its type, implies time study, in that the time the motion occupies is one test of the efficiency j of the motion.
Micromotion study is the name we have given to our method of recording motions and their sur- rounding conditions by means of a cinemato- graph and one of our special clocks which regis- ters extremely small intervals of time, smaller than the elapsed time between any two pictures of the cinematograph film. The micromotion method enables us to record easily motions down to less than a ten-thousandth of a minute. This gives us all the information we could desire for purposes of time study, and the record is abso- lutely free from the errors in time due to the personal element. Although many of the vari- ous elements, or units, that comprise the path of a complete motion, or cycle of activity, ap-
120 FATIGUE STUDY
pear on different pictures in the film, it is diffi- cult to visualize or measure the orbit or exact path of the motions by means of the film.
The cyclegraph method permits us to record, measure, and see this orbit or exact path of a motion or cycle of motions. Small electric lights are attached to the hands, or any other members of the body involved in the motion. A photographic plate or film is then exposed while the motion is made, with the result that a path of light, which resembles a white wire, is seen upon the developed plate, representing the path of the motion. The effect is best gained by a stereoscopic photograph, which shows this path in three dimensions.
The chronocyclegraph method enables us not only to see the path of the motion, but also its directions, and the duration of the entire motion and of its elements. These chronocyclegraphs are made by attaching lights to the moving parts of the body, or machine, as in the cyclegraph, and by introducing a properly timed, pulsating interrupter in the circuit, which may be adjusted not only to record the time and duration, but also to record these with different graphs, repre-
FIG. 20
This picture shows a lamp attached to the hand for the purpose of taking cyclegraphs or chronocyclegraphs of mo- tions in connection with obtaining motions of least fatigue.
FIG. 21
This picture shows an experiment that was carried on by us some time ago for determining the laws pertaining to the times and fatigue of motions of different lengths.
The operation studied is that of moving a seven pound weight. The times are divided into three parts : Length of time from starting to picking up weight; length of time from picking up weight to depositing; and length of time of recovery to standing position from depositing. The ex- periment proved that the time of motions of different lengths Is practically the same unless those of the same length are consecutively repeated. The quantity of work that can be done in a day is, of course, much less with long motions than with short ones, due to extra time needed to overcome the fatigue of the long motions.
FATIGUE MEASUREMENT 121
senting the paths of each of several motions made by various parts of the body and their exact dis- tances, exact times, relative times, exact speeds, relative speeds, and directions.
By means of the " penetrating screen," it is possible to pass a cross-sectioned plane in any direction through any desired plane, or through any number of planes in the cubic space under observation. This makes it possible to re- cord the data with great accuracy in three dimen- sions, and to read the information from the data easily.
These various types of motion study supple- ment rather than supplant one another. Motion study is primarily for the purpose of observing the variables that affect such study, and for arousing such co-operation between observed and observer, as will make possible the testing of the differences of the effects of the variables. Micro- motion study provides for an accurate record of what happened, with all such attending circum- stances as appeal to the eye. It is the greatest aid in transference of skill and experience from a worker who has it to one who does not possess such skill and experience. The cyclegraph is
122 FATIGUE 'STUDY
useful in providing a simple, easily understood record of the path that any activity followed. The chronocyclegraph is most valuable when the activity is complicated, and when the time and direction of the elements of the motion must be visualized continuously in order to analyze, meas- ure, synthesize, and standardize the process. The penetrating screen, finally, is useful in re- cording the three dimensional paths and speeds of even the smallest unit of activity.
^
These methods of applying motion study have been patented, but have been for years freely at the disposal of the colleges, which have begun to use them as means for recording accurately scien- tific data of various kinds. They have justified themselves as more accurate than ordinary rec- ords of activity, and have within recent times been put on a basis which makes their cost com- pare favourably with less accurate methods of measurement. What is more, we have discov- ered in our data, especially in the chronocycle- graphs, direct records of fatigue, that we believe are the first records of fatigue ever made under industrial conditions. The micromotion films also show breaks in well established habits of
FIG. 22
Typical chronocyclegraph of the motion and fatigue study of a bricklayer, laying three brick in the old method.
FIG. 23
Typical cyclegraph of motion and fatigue study on a drill press, showing cyclegraph of path of motions of the left hand.
FIG. 24
Typical chronocyclegraph of compositor setting type by hand.
FIG. 1M
FATIGUE MEASUREMENT 123
several motions that are undoubtedly due to fa- tigue, but the irregularities in the orbit line, that appear in the cyclegraphs, and that must, be- cause of close control of the variables, be due to the fatigue alone, are more impressive from the physiological viewpoint.
Testing the Work by Motions Required.
It is for motion study to explain the methods of deducing standard methods by using activity records obtained through the various types of mo- tion study data. Many such standards have been derived. We have in our motion study data many elementary motions with records of the space they cover and the amount of time they re- quire. With these we can test the given work to see which of these motions it includes. Hav- ing tabulated this, we can make an intensive study of the motions that remain. When this study has been made, we can combine the result- ing elementary motions that have proven them- selves most efficient into the working method, and classify the work as work of a type requiring a certain set combination of motions.
124, FATIGUE STUDY
Testing Workers by Motion Capabilities. t In the same way we may test a worker by mo- / tion learning capabilities, before assigning him / to any kind of work. Having reduced activities I to their motions, we can test the worker's physi- \ cal capability; his mental capability we can test ! by determining his learning curve. To these re- sults we add a record of his interest in various types of work. From the resulting three types of records, we can make placements that, we be- lieve, are far in advance of any that have been made up to the present time.
The Use of Activity Records as Data for Elimi- nating Fatigue.
The fact that activity records are made of ex- tremely small elements moving through a short path in a small amount of time means that the fatigue records cover the same short periods. This is a great help in making fatigue study. A new combination of elements of activity will also mean a combination of concurrent, or included, elements of fatigue. The combination may have some effect on the activity. If so, it will also af- fect the fatigue, but at the present state of the
FATIGUE MEASUREMENT 125
art the most accurate and satisfying work can be done by making use of activity records to elimi- nate unnecessary fatigue, without waiting for some hypothetical, direct records of fatigue, that may be worked out in the future. In other words, if you have accurate records of fatigue included in your activity records, use these im- mediately, without attempting to make separate records of the fatigue, that, while valuable, will mean delaying fatigue elimination, perhaps in- definitely.
The Time Element.
Too much credit can never be given to Dr. Taylor for his emphasis on the laws of the time element. He was the first to call to our attention the fact that operations should be divided into the smallest possible, timable units for setting tasks. In this way it is possible for timed elements to be used in many combinations, thus eliminating an enormous amount of unnecessary work. Dr. Taylor also recommended that work periods should be timed separately from the rest periods. Our new measuring devices for time study make it possible to record much shorter intervals of
126 FATIGUE STUDY
time than were heretofore known, and now the limiting factor in the problem is no longer the quickness with which we can use a stop-watch.
Our methods and devices have been criticised as being specially adapted to problems involving the minutia of motions, but too expensive for the general time study purposes. A moment's con- sideration will show that the turning of the crank of the cinematograph may be done as slowly as the requirements of the particular case of time study demand. In fact we have films that were taken at the rate of one picture every ten min- utes. With the sixteen pictures to the foot, a foot will last one hundred and sixty minutes, or two hours and forty minutes, at a total maximum cost of six cents. If desired, the speed of the crank can be instantly changed to any desired speed to enable one to take pictures too quickly to be seen with the eye, and more accurately than the highest-priced time study man can take by means of a stop-watch.
Our methods, devices, and records of activity and of output fulfil every requirement, and are now perfectly satisfactory. Fatigue still re- mains the elusive factor. Nothing but long-con-
FATIGUE MEASUREMENT 127
tinned observation, absolute accuracy and co-op- eration between all interested will reduce fatigue study to the science which motion study has be- come.
The Standardization of Work and Rest.
Meantime, in standardizing work and rest pe- riods, it is customary and proper to make a larger allowance for fatigue than the records show to be necessary. We cite as an example a case of folding handkerchiefs. The old method of folding was to have the workers seated at low tables in chairs of ordinary height, working throughout the entire day, with the only rest periods an hour at noon and such ceasing from folding as took place when the workers went for supplies, or took back finished product to be checked, or other rest periods that they took at will, as the work was piece work. After an in- tensive study of the problem, made not only to increase their output but to better their work- ing conditions and allow them to earn more money with less fatigue, the following schedule of work and rest periods was adopted.
Each hour was divided into ten periods. The
128 FATIGUE STUDY
work was placed on a work table of the proper height. The handkerchiefs already folded, those being folded, and those to be folded were arranged in the most convenient and efficient manner. All variables of the work had been studied, and the results of the study standard- ized. The first four periods, that is, the first twenty-four minutes, the girl remained seated. She worked five minutes and rested one; again worked five minutes and rested one. That is to say, she had four minutes' rest out of the twenty-four, and spent this rest seated so that she might lose no time in getting back to the work. The next two periods, that is for twelve minutes, the girl was standing. Again she worked five minutes and rested one minute, and for the second time worked five minutes and rested one minute. That is, she rested two out of the twelve minutes in the same position in which she worked. The third group, a space of eighteen minutes, she spent either sitting or standing, as she pleased. Here also she worked five minutes, rested one minute ; worked five min* utes, rested one minute ; worked five minutes, and rested one minute in the position, either standing
FATIGUE MEASUREMENT 129
or sitting, which she herself had chosen. The last period, which consisted also of six minutes, was spent by the girl walking about and talking, or amusing herself as she otherwise chose. With this might be combined the last rest minute or period No. 9, which thus gave her seven consecu- tive minutes for unrestricted rest activity.
This was the schedule for all hours of the day except the hour before noon and the hour before closing time at night. In these hours the first nine periods resembled the first nine periods of the other hours ; but the tenth period was spent in work, as a long rest period was to follow.
At the end of the day's work under these con- ditions the girls accomplished more than three times the amount of their previous best work, with a greater amount of interest and with no more fatigue. It may be stated here that the primary aim in this investigation was not to elim- inate fatigue, but to increase the wages of the girls by raising the output. The operators had not seemed overfatigued at the start. They maintained that they were less tired at the close of the day when using the new method, and cer- tainly the amount of fatigue caused by producing
ISO FATIGUE STUDY
an amount of output such as was made unde] the old method was reduced to an enormous ex tent. With further practice these preliminary results will be further improved.
It is of fundamental importance in making ai investigation of this type that the allowance foi fatigue be greater than the physical condition 01 the worker at the end of the day seems to indi cate necessary. It is also fundamental that th( results of the investigation be at once incorpo rated into actual shop practice. If each membei of the organization is at once placed under sucl working conditions that he can enjoy the rest periods along with the high pay that comes from a large product, he will co-operate most fully ir the progressive work of fatigue elimination. vlt is a fundamental rule of scientific management that the rate once set must never be cut. It should also be a fundamental principle of our management that rest periods once established should not be abolished or shortened. Let the error, if error there is, always result to the ad- vantage of the worker, never to that of the em- ployer. If you have not allowed enough rest, make the allowance larger, then reinvestigate.
FATIGUE MEASUREMENT 131
If you have allowed too much rest, let the job stand as one to be given for special merit, and attack some other problem. The result will be an increased co-operation which will more than compensate for the occasional over allowance for fatigue.
Summary.
Fatigue measurement, as applied to the indus- tries, is a new science. It is being developed through a study of the data of activity. The methods of measurement of activity are motion study, micromotion study, the cyclegraph, the chronocyclegraph, and the penetrating screen. Through the data derived by these, we standard- ize motion paths, motion habits, and all other motion variables. These enable us to test and classify, select and place, both work and workers, and to eliminate unnecessary fatigue. Through the time element we compare our various data, and finally arrive at results that enable us to standardize work and rest periods. Any errors in length of rest periods must result to the ad- vantage of the worker.
CHAPTEE VIII
MAKING ADJUSTMENTS: HOW PRESENT PRAC- TICE IS DEVELOPED INTO STANDARD PRACTICE
A Concrete Example of Making Adjustments.
In order to make plain exactly how changes are made and take place from the condition be- fore analysis, measurement, and synthesis are made to the standard method of doing the work, we shall take a concrete example and consider it from every phase. This concrete example will be the assembly of a braider or machine for man- ufacturing braid, which is a standard product of the New England Butt Company. With the co- operation of Mr. John G. Aldrich, who has since become president of the company, the problem of assembling a braider was studied, both in the laboratory and in the shop.
It is not generally recognized that ultimate standards can best be derived in the research room and laboratory. The standard practice in
132
MAKING ADJUSTMENTS 133
the plant will be the result of the laboratory prac- tice. If the finer measurements are made in the shop during the general working operations, much time will be lost, as shop conditions cannot be controlled as laboratory conditions can. It has been said that laboratory experimentation is not directly available in shop practice, because laboratory conditions differ from shop condi- tions. They certainly do differ, but so do the ultimate shop conditions that must be introduced with the new standard method. The ultimate conditions in the shop are far nearer the labora- tory conditions than are the shop conditions prior to installation of the new methods.
Former Method of Assembly.
The method of assembly in use before the mo- tion study and fatigue study were applied was as follows : The base of the braider was placed on an ordinary low bench, and the various parts were kept in tote boxes or on the floor. The worker selected such parts as he wished, and put the braider together according to any traditional method that he had learned, together with such changes as his whims dictated.
134* FATIGUE STUDY
How the New Practice was Derived.
All of the previous assembly methods had been determined by the usual practice of putting braider parts together. In the present case the braider was taken apart ; that is, handled in the reverse order of assembly, in order to determine from a new viewpoint the best method of putting the various parts together. The parts were laid out on a table in the sequence in which they were disassembled. This allowed the various mem- bers of the braider divisions, groups, and sub- groups to be studied in relation to one another and also separately.
The Two Factors to Be Considered.
The problem resolved itself into two parts :
1. To make the table of the most convenient height and shape to hold tools and the base group as it grew, while being assem- bled.
2. To provide the most convenient, tempo- rary, resting place for the tools and the various parts, before they were carried to the final position of assembly.
The two parts were so closely related that any
FIG. 25
Easel for simplifying motions and reducing fatigue from work of assembly. The obvious sequence in our packet method eliminates the delay and fatigue of the decision of choice.
FIG. 26
The rigging on a typical Gilbreth packet, as used for the assembly of braiders and cord machines at the New Eng- land Butt Company. This picture shows only the support- ing devices. The length of the supporting devices is de- termined by what is to be held upon them. The right quantity of each kind, therefore, can be put on without counting. These devices are standardized and are but few in number. They are specially designed and arranged for picking up parts with both hands, simultaneously, in an obvious sequence with shortest motions and least fatigue.
MAKING ADJUSTMENTS 135
modification in one demanded a modification in the other.
Outline of the Changes to Be Made.
It became apparent, as the work progressed, that the determining elements were (1) to shorten, as far as possible, the distance for trans- porting the arms and hands while loaded; (2) to arrange the parts so that their sequence of use would be obvious; (3) to position each piece so that it could be grasped, transported, and re- leased in the shortest time with the least expendi- ture of effort and with the least resulting fatigue. This meant that the parts should be arranged on some sort of a holder, or packet, that would shorten the transporting distance, and that the base group should be placed upon a table that would carry it as near this packet as possible.
The Solution of the Problem.
A packet, which was practically a table with its top extending vertically, was placed near the table supporting the base group, and removable wire rods of the right length were placed in it to support the various pieces in the best position for
136 FATIGUE STUDY
grasping. This also considered the shortest dis- tance for transporting the arms and hands, whether empty or loaded. These table packets were then modified, following closely the princi- ples of the design of the brick packet, especially the hand-hole feature for firm grasping with one motion and for quick counting of the number of pieces. The packets now consist of strips of wood two inches apart, horizontally, and two inches apart, vertically, with holes for pins, in- terchangeable wire rods, forked hooks, and other hangers, including interchangeable platforms, shelves, and vertical supports, extended and posi- tioned for still shorter reach, and holding in turn such devices as pins to permit the best position for handful grasping without disturbing the mo- tions of the hand or the wrist from the natural position, or, that is, the position most resembling that of normal rest.
The right position for grasping anything with least fatigue is that position that will permit grasping without turning, twisting, or holding the wrist at all from its natural resting position, that is, with muscles in natural balance. It is but natural that this should be the best way, for
MAKING ADJUSTMENTS 137
it cuts out the positioning motions of the hand prior to grasping.
Two reasons that the strips of wood were made two inches apart, horizontally, and two inches apart, vertically, were:
1. Because we desired to get standard data at the same time comparable with our other standard data. We might also use it for checking, by means of motions in another trade, the underlying laws of mo- tions, which we had already deduced in several other trades.
2. Because we desired to have the motions in very nearly the same places every time, in order to get the extra efficiency and the lesser fatigue that come from the habit that is formed in this reaching and grasp- ing.
Many of these laws have since been re-checked and used in methods of least waste for the trans- ference of skill from one trade to another. Habits have been formed that permit a much greater amount of output with less fatigue.
This latticed packet gives us the same dimen- sions as our cross-sectioned background. We use
138 FATIGUE STUDY
four inches in our American work, and ten centi- metres in our European work for these distances — the difference between ten centimetres and four inches being almost exactly one-sixteenth of an, inch, or so small a difference as to be practi- cally negligible in work on motion study.
This cross-sectioned packet has, therefore, not only many mechanical benefits, such as forming supports, either horizontally or vertically for hangers, but it is also cheap to build, light in weight, and forms an excellent, relative scale for measurement and for "recording the surround- ing conditions " of a case of micromotion study.
In fatigue study, as in all other work of inves- tigation, it is difficult to obtain assistants who can " observe what they can see." Of those ob- servers who observe what they can see, few will write down what they observe. Of those rare ones who can observe and will always write down, few have the habit of maintaining the standard conditions in a long series of observations. We therefore cross-section the background, make our devices, when possible, multiples of four inches, and record the conditions by means of photogra-
FIGS. 27 and 28
This picture shows the arrangement of parts for the base group of the braider. It will be noticed that there are three adjustable shelves, two vertical and one horizontal, for the support in a more convenient position of certain parts that have to be picked up, for least fatigue, by hand- fuls at a time. The various kinds of shelves, clamps, and tables for different sizes or kinds of machines can be re- moved or attached to the packet with one motion of the hand.
Note that the top plate is in position and that the tools are at the right side of this top plate before the as- sembler is sent to the job at all. These parts are arranged in an obvious sequence, and a photograph similar to this is given to the boy whose duty it is to arrange these parts.
MAKING ADJUSTMENTS 139
phy, that gives us the key to causes of deviation from class results.
The modification of the table consisted of mak- ing it of such a design that it could be turned over on its side to form a low table for tall or double-deck braiders, that would permit motions of less fatigue.
Final Adjustment.
In its final form the method consisted of hav- ing the parts of the braider placed on the packet by an unskilled laborer or boy, putting large tacks on the floor, which located the table at the most convenient point possible in relation to the packet, which was made fast to the wall or of easel type, on casters, as the position where it must stand demanded. In addition, a small gravity, Johnson-Littlefield packet was attached to the table. This conveyed certain parts, by their own weight, to a yet more convenient posi- tion.1
i The Johnson-Littlefield packet is a splendid example of the types of fatigue saving devices that are suggested by employees after they have been taught the underlying prin- ciples of motion study.
140 FATIGUE STUDY
Changes in Type of Work Demanded.
Through this adjustment the assembler used only his most skilled motions in doing his work. Meantime, the less skilled worker, or appren- tice, who was loading the packet, was learning the assembly principle, and receiving an appren- ticeship in assembly itself.
Change in Mental Attitude.
The effect of the adjustment was to establish easily and quickly a new set of efficient habits. The parts being arranged on the packet in an obvious sequence, and the tools being arranged on the table in the standard position, the worker necessarily performed the work according to the standard method, which was the quickest and least fatiguing method, every time that he did it. The result improved his working method, and acted as an incentive to him to do the largest quantity of work of the best quality that could be done with a reasonable amount of fatigue.
Value of This Example.
This example is even more valuable as a method of attack in the adjustment problem than
FIG. 29
This picture shows a Littlefield-Johnson carrier packet. In this carrier packet the carriers by their own weight travel downward to a standard position at the bottom for grasping without looking at them, as fast as they are in- dividually removed. This packet was invented by two men in the New England Butt Company, after they had seen our method of attack, and had begun to think of their work in the terms of elementary and least fatiguing motions. .
FIG. SO
This picture shows a Gilbreth packet and a Gilbreth bench, arranged with the carrier packet shown in Fig. 31 for the assembly of a 13-strand braider.
MAKING ADJUSTMENTS 141
it is as a specific illustration of a successful and rapid installation. The workers enjoyed the changes and accepted them in the best spirit of co-operation. Before using the method, eighteen braider base groups had been a large day's work, per man. With the new method, sixty-six, per man, per day, were assembled with no added fa- tigue. The resulting saving pleased every one concerned, and has assured the maintenance of the method. Like all other methods, old or new, it must be submitted to certain definite tests. These it has passed with credit. The outlining of such tests is our next problem.
Summary.
The problem of adjustment and its solution can best be illustrated by a concrete example. This is of changes made in assembling the base group of a braider. This example is valuable not only as an incidence of successful application, but as an outline of an efficient working method.
CHAPTER IX
THE OUTCOME: HOW FAB HAVE WE ATTAINED OUR AIM?
The Tests of General Health.
We will now assume that the reader has at- tacked the fatigue problem in his particular plant, and has applied either preliminary or more permanent fatigue elimination. There are vari- ous general measurement tests which he may apply to the results, in order to see how much better the working condition of his organization actually is than it was when he started in upon his fatigue-eliminating work.
The first of these is the test of general health. It is, of course, perfectly possible that an indi- vidual worker's general health may go down un- der far better working conditions; this, because of some home influence, or something in his gen- eral condition or his life away from work, which pulls down his health. It would not be fair to blame the work for any illness easily traceable to
142
THE OUTCOME 143
home conditions, to an epidemic prevalent, or to some certain outside source; but, if conditions away from work have remained fixed, there is every reason to expect that general health should improve with fatigue elimination. This we find in actual practice is the case. Even where fa- tigue is not materially cut down during working hours, because measurement shows that the worker is not getting over-fatigued, the general health is apt to improve because of greater regu- larity in habits of work, and because of better physical and mental habits, while doing the work. The path along this line is a continui__
ous, never-ending, upward spiral. Fatigue is eliminated by establishing proper habits. Proper habits improve health. The improved
health allows of more work with less fatigue, etc.
*•
The Test of Prolonged Activity.
In order to be thoroughly satisfactory, obser- vations of the effect of the changes upon the worker must be made during a long period. The worker's greatest asset is his ability to work. In order to prove its value, fatigue eliminating work must actually show results in prolonging
ck.
1441 FATIGUE STUDY
the years that he is able to devote to his life work. This in practice it does. Not only does the average worker remain physically able to work more years than where no fatigue elimina- tion has taken place, but also through the fa- tigue study and motion study, which he has co- operated to make, he learns to be able to teach that thing, or those things, at which he is most skilled, and thus to prolong his years of economic value. You must note how many of your work- ers are beyond the usual working age, and are still at work. Some of these will be working at the work itself; that is, in the performing de- partment. Others will be planning or teaching the work in some way. The number of these and their condition will form an admirable unit of measurement of the success of your work.
The Test of Posture.
The third test is that of posture. Take an- other walk through your plant, and look at those workers to whom fatigue elimination work has been applied, and note how they are sitting, or standing, or walking.
The American Posture League, with headquar-
FIG. 31
B. Micromotion of workman reaching with both hands for pieces of a machine which is being assembled. The microchronometer in the foreground registers divisions of time to the half a thousandth of a minute, and therefore gives us much data relating to time study, motion study, and fatigue study.
Set of experiments in fatigue study for proving that times of motions have little close relation to lengths of motions unless the same length of motion is repeated con- secutively many times. (See Fig. 21.)
C. Penetrating screen in the plane of the motions for the purpose of registering exactly the distance of motions in fatigue study experiments.
THE OUTCOME 145
ters at 30 Church Street, New York City, will gladly furnish standards for proper posture in various positions. It will be impossible, of course, to eradicate wrong habits of posture in a short time, no matter how radical the change may be, but you should note improvements. At least each worker should be so placed that he could work in the proper posture if he chose, and so. that the proper posture will be the easiest for him. If the chairs, benches, levers, or devices force him to assume the proper posture, so much the better. Consideration of the devices shows, unfortunately, that few are designed for oper- ation with least fatigue ; more being .designed to use the least quantity of material.
In the case of young workers, especially, it is surprising how quickly the proper devices will induce the correct posture, especially if the bet- terment staff co-operate to explain the correct posture, and its effect upon health. Where no betterment staff exists, the posters of the Pos- ture League will serve as desirable examples and object lessons. Here again, as in so many other places, " fashion of work " is a most important element. Let correct posture become the fash-
146 FATIGUE STUDY
ion, and let the devices make the posture possible, and astonishing results will follow.
It is, of course, always a great aid to make anything that one desires the easiest thing to do. The proper chairs and work places make correct posture the easiest posture to hold. This is a great force towards maintaining it.
The Test of Behaviour and Implied Mental Atti- tude.
The fourth test is to observe the behaviour of the workers. Do their actions, their resulting work, and whole attitude towards the work indi- cate that the fatigue eliminating work has been effective? There should be better " habits of work" than have ever existed before. More work should be turned over to the habit processes, and the formation and maintenance of good habits should become a part of the day's work. It should be noted just exactly what seems to be the kind and amount of incentive that keeps the workers at the work. If the fatigue elimination has done what it should along its line, the reason for doing the work as it is being done will be the belief that this way is the best way yet found, a
THE OUTCOME 147
belief that one is safe in following the method, since proper allowance for fatigue has been made. There should also be present a desire to con- tribute to the welfare of all by looking for easy ways, as well as scientifically-derived ways, to eliminate fatigue, while at the same time follow- ing the best method as yet available.
The question of motivation is one demanding understanding and serious consideration in every field of activity to*day. This is true in educa- tion. It is also true in the industries. The mo- tive of getting all that one can for one's work must always exist, and is a perfectly justifiable motive, but the fatigue-eliminating work cannot be considered successfully, unless this motive of self interest has also with it the motive of interest in the welfare of others, and in cutting out all fatigue that can effect any member of the group in any way. This feeling should express itself in a social attitude, which is another behaviour test. If every member of the organization stands ready to endorse the fatigue elimination, and to co-operate in further fatigue elimination for the good of all, the social attitude shows that the work that has been done is worth while.
u,
3T\
rk
148 FATIGUE STUDY
The Test of Transference of Skill.
The amount of skill that is successfully trans- ferred may be used as a test of fatigue elimina- tion. Each member of the organization is sup- posed to transfer skill, and also to acquire skill. He transfers to others the skill in the lines of work in which he is proficient, yet which are not the highest types of work that he can do. He learns from others such types of work as are of the highest type that it is possible for him to learn, that he has never had an opportunity to learn because of the time taken by work requir- ing less skill, that it was necessary under the old plan for him to do.
It is a fallacy to suppose that work which does not demand all the skill at one's disposal is less fatiguing than work which does. Work is not less fatiguing because it demands less skill. It is less fatiguing when it is done with ease and when there is a joy of achievement requiring skill ; that is, when it is satisfying. Because of lack of opportunity, one may only perform with ease the work which does not demand much skill. As soon as he learns to perform the skilled work with ease, it causes even less fatigue, other things
/ wi
THE OUTCOME
being equal, than does unskilled work, because it holds the interest, hence the attention, more easily. _^ -•""
We enjoy doing that which we can do well. Whether we improve in the doing because we take pleasure in doing it, or simply because the pleas- ure makes us do more, and we improve with the practice, is not of great importance. Psycholo- gists are divided in their opinions as to the effect of pleasure upon work, but all agree that, directly • or indirectly, pleasure in the work does affect the work favourably. Through the transference of skill this pleasure is given to the work, or in- creased in the work, and, therefore, the amount of skill transferred is a test of fatigue elimina- tion.
Test of "Happiness Minutes," Individual and Social.
The final test of fatigue elimination, as of every other change made in doing things, is its in- fluence upon the total output of " Happiness Minutes." The aim of life is happiness, no mat- ter how we differ as to what true happiness means. Fatigue elimination, starting as it does
150 FATIGUE STUDY
from a desire to conserve human life and to elimi- nate enormous waste, must increase " Happiness Minutes," no matter what else it does, or it has failed in its fundamental aim. Have you reason to believe that your workers are really happier because of the work that you have done on fa- tigue study? Do they look happier, and say they are happier? Then your fatigue eliminating work has been worth while in the highest sense of the term, no matter what the financial out- come. Naturally the savings that accrue must benefit every one, but saving lies at the root of fatigue elimination, and, if every member of the organization, including the manager and the stockholders, is getting more " Happiness Min- utes," you surely are working along the right lines.
Social " Happiness Minutes " will consist of he sum of the individual " Happiness Minutes " plus that intangible thing called " social spirit," It is exemplified in a case like this : A certain group of workers had been studied from the mo- tion study and the fatigue standpoint. The re- sult of the work had been incorporated in their daily practice, and they had been working for a
FIGS. 32 AND 33
These pictures are of meetings of the Foreman's Club at the New England Butt Co. examining films of methods of least fatigue, proposed for standardization.
THE OUTCOME 151
period of many months under the readjusted working conditions and with the new methods. At the end of this time they were gathered at a foremen's meeting, where a micromotion film, showing the development of the methods which they used, was presented. In discussing the film the speaker took the occasion to say that on ob- serving the work in the plant he felt that some lapses from the method prescribed were in exist- ence. The next morning, when he walked through the plant, he was stopped by a worker, who said, " See here ! I don't believe we are falling away from that method a bit. If we are, just show us where, and we will go straight back to it. We want to play the game right." This is the test of the outcome. Is the organiza- tion lined up as one man back of the work? If so, the problem of maintenance and of automatic improvement is solved.
Summary.
At any stage in the process of fatigue elimina- tion the results may be tested. The general health of the worker, his prolonged activity, his posture, his behaviour act as such tests. To
158 FATIGUE STUDY
these may be added the amount of skill trans- ferred and being transferred, and the effect, in particular, on " Happiness Minutes." If the or- ganization endorses the work and co-operates in it, the work may be rated successful.
CHAPTER X
THE FUTURE: WHAT EACH ONE OF us CAN DO
The Work of the Colleges.
It should be the work of the colleges to gather together what has been done in fatigue elimina- \ , tion, and to put it at the disposal of all inter- ested. Each college should start a fatigue mu- seum, and should invite its graduates first, and all those in its vicinity second, to co-operate and to send exhibits or pictures of exhibits to its mu- seum. The colleges are recognized as not inter- ested in any particular industry, as fair and impartial, and as standing for uplift in the com- munity. It is, therefore, their duty to act as repositories for the data, at least until such times as the national government takes over the lead- ership in the entire fatigue question, and becomes the custodian of the data.
The colleges can help in a second way by mak- ing fatigue study a subject in the curriculum. *
153
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It is not necessary that this be a new subject. It should rather be a new aspect in which the old subjects are presented. Especially in the col- leges of engineering and business adminis ration great emphasis should be laid upon fatigue study, both the theory and the practice. It is not essen- tial that the students be sent out into the shops for actual practice in such study, although any- thing like the half-time plan is to be commended. The student may well apply fatigue study to his own activities. This will present an admirable field and a splendid incentive. After such a study the fatigue problem will never again seem remote or vague to the student. Also the stu- dent may well be sent, or taken, on tours of in- spection through neighbouring industries, or may be allowed to co-operate in preliminary fatigue surveys. They should learn the general princi- ple of fatigue study, and should become finger- wise. This preparation is identical to that for making motion study, and, in fact, is prerequisite or first step for greatest success in any mana- gerial work.
But the college should not confine its activity in fatigue elimination to the museum, and to
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training the student who expects to enter the field. They should themselves become examples of successful fatigue elimination. In this way they aln do most to cut down waste, and to train our young people to take an active part later in the waste elimination campaign being waged in the world's work.
The Work of the Manager.
The fatigue study and the installation which must follow it to be done by the manager have been outlined in this book. The manager who has put his own plant at such a stage of improve- ment that unnecessary fatigue is cut out to a great extent, and that recovery from necessary fatigue is provided for, has contributed greatly to the cause, but his work should not end here. He should educate those with whom he comes in contact on the subject of fatigue elimination. He should co-operate with those in his own neigh- bourhood, and also -with those in his own trade towards solving the fatigue problem peculiar to the locality or the trade.
The Home Reading Box has been successfully installed by a group of manufacturers engaged in
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the same trade. This particular work furnishes an admirable starting point, and is a great help in arousing local interest. If even a few inter- ested in the same trade in various parts of the country will co-operate, it will soon be possible, through trade journals, and through a general demand for equipment designed from the fatigue standpoint, to revolutionize fatigue conditions in that industry. Editors and writers of papers of all types have been quick to see the benefits of fatigue elimination, and to offer to co-operate in a campaign for education. Manufacturers have been equally eager to satisfy any demands which may be made. The managers can have a large share in making such demands, and in encourag- ing the support of publications in which they are interested.
The Work of the Worker.
The worker has two chief ways in which he can help in fatigue elimination. The first is to co-operate with the management in installing fa- tigue elimination methods and devices in the particular plant in which they are both inter- ested. The second is to help to make fatigue
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elimination fashionable. This latter duty lies with no one but the worker himself. No new methods spread more quickly than the " fashion of work." There is nothing of which a well run plant is more proud than the " way " it works, the work spirit. The whole idea must be that it is a disgrace to have causes of unnecessary fa- tigue existing. Overfatigue is a positive proof of inefficiency. There is no fear but that the workers will recognize these duties, and will per- form them heartily and with good will, when they know that they are getting a square deal. It is right that they should make very sure that they are going to receive such treatment, and that fa- tigue study is not a new scheme for taking ad- vantage of them, but they must be ready to listen to the proof and to accept it when they are con- vinced that it is true. Having accepted it, and thus made sure that they are safe in co-operating, the next step is to help actively in the good work.
The Work of the Public.
The great work of the public is to demand fa- tigue elimination. The adoption of a few simple slogans, like " Buy of the seated worker," would
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help bring immediate results in fatigue elimina- tion. Consider what the Consumers' League has done in securing better working conditions. Note how the " Safety First " movement has spread through the whole country. The " Fa- tigue Eliminating Movement " can spread in the same way, if only every one will do his part to demand that the fatigue be reduced and to help in the actual reduction.
The workers of the country have long recog- nized the need for fatigue elimination; the em- ployers are coming to a realization that they are paying a large price for fatigue. Many employ- ers have resolved that, so far as their plants are concerned, needless fatigue must be eliminated. They have resolved that the day is coming when every worker shall go home from work happy in what he has done, with the least amount of un- necessary fatigue, and prepared to go back in per- fect condition on the morrow. How soon this much desired time will arrive depends upon the co-operation of the public, upon the public senti- ment that can be aroused.
There is no reader of this book who does not belong to at least two groups that should be in-
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terested in fatigue elimination. Decide at once, then, in which group you belong, and set to work. Be you teacher, manager, worker, or simply a member of the great public to which we all be- long, begin to work for fatigue elimination, and begin now.
The good in your life consists of the quantity of " Happiness Minutes " that you have created or caused. Increase your own record by elimi- nating unnecessary fatigue of the workers.
'
THE END
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