Study Mech

  Q-5. Mention the design guidelines to be followed in low quantity production. Ans: In any product, manufacturing and assembly cost is a very important consideration. It affects the overall cost in a significant manner. However during the design phase, with some consideration in product design, production cost can be reduced.  In case of low quantity production. Design guidelines to be followed in low quantity production:   During the design phase, it is good to use standard components in design. Because of low quantity production, using non-standard components may significantly increase the cost. For lower quantity production, worst case tolerance can be used. Providing loose tolerance may reduce part rejection in the inspection phase, hence maximum parts can be approved. If too tight tolerance is not necessary, then try to provide more tolerance range. Hence, it also eliminates the use of a special finishing process and reduces post processing cost. In case of low qua...

  Q-4. What is redesign? What are the steps to be followed to reduce the cost in the existing part or assembly? Ans: Concept of redesign refers to changing or improving the existing product characteristic by design or material improvement. Product may be a single part of an assembly. Based on market requirements or to take advantage of new facilities, it's necessary to redesign products.  Steps to be followed to reduce the cost in the existing part or assembly:   Product development starts from design. During the design phase, the product should be designed in such a way that it can be easily manufactured with existing facilities. Hence, excess cost can be reduced. Assembly or part manufacturing cost can be reduced by choosing the right manufacturing process for the product. Also, selection of the manufacturing process is based on material, quantity of product  and other design parameters,like dimensions, tolerance etc. Using too tight tolerance leads to extra proce...