Chapter 20. Tolerance Optimization
The design of a tolerance is, in part, a trade-off between the costs of reducing variability in production and the economic consequences of that variability. The decision criterion is minimum total cost.
The process of specifying a controllable design parameter has three fundamental steps:
1. With tolerances relaxed to economically practical levels, increase the robustness of the designs to reduce their vulnerability to variations in their control parameters.
2. Increase the robustness of manufacturing and service processes to reduce the probability of unacceptable variations in replicated control parameters.
3. Tighten the tolerances of those control parameters having the most influence over system performance ...
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