We can't under-estimate the power of a well laid-out qualification process. We've all heard about DVT, the Design Verification Process step that puts one's product through several testing requirements; but a comprehensive qualification plan requires more than DVT. My professional experience has shown that a 3 steps qualification process: EVT, DVT and PMT allows a much more thorough qualification. These acronyms can be stated differently in different organizations, but they have about the same meaning: EVT is for the early stages of product development, when the product is still somewhat imature; for example, for an electronic assembly, one can choose to conduct EVT on just the PCBAs before they are mated to the main system. DVT is for a more mature stage of product development, when …
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