It is common that each engineering assembly product has A,B and C class components which together comprises assembly. A class component has high contribution in product function, cost and profitability of the engineering enterprise. A special technical research is must for this class of components. Product assembly is another crucial function where all failures are coming on the surface. Where all components are to be available simultaneously to complete assembly. This is important stage because if component supply is interrupted assembly function stops. Many times the components cannot be supplied due to selection and use of traditional manufacturing techniques used at the time of sample lot submission. These short cuts taken during development phase are becoming hurdles at the time of commercial or bulk production of assembly. Selection of most suitable and advance techniques for manufacturing of all components gives quality and quantity of all components and streamlines assembly functions. Keen approach towards manufacturing techniques eliminates quality and productivity problems which occur at the supply stage of the product. This also derives long term benefits such as customer satisfaction gain, product life cycle growth.