PRODUCT SPECIFICATIONS, CRITICAL PARAMETERS, AND MEASUREMENT STANDARDS
Building a product starts with an accurate and detailed set of technical drawings and specifications. A final assembled product can have several subassemblies and components. Each level of assembly has critical dimensions and parameters, all of which have specification limits. An engineering team has to go through several steps and negotiations to generate these critical dimensions and parameters. After many meetings with customers, manufacturing groups, and quality groups, final values of critical dimensions and parameters and their tolerances are settled.
An agreed-upon tolerance depends on the manufacturing process capability, appropriate level of measurement resolution, ...
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