DFM Guidelines for Part Design

This chapter lists some general guidelines for part design, including fabrication, part standardization, symmetry, tolerances, part shapes, and combining parts and functions. For critical parts, the part designer should be an early and active participant in the system engineering of the product or subassembly to help optimize the systems architecture concept that determines the part’s requirements. The part designer must understand the purpose of the part, how it fits in, how it relates to the whole, and the relative importance of function and performance, cost, rigidity, weight, and tolerances, especially stacks it is a part of:

“Toyota’s process does not focus on the speedy completion of individual component ...

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