Noise Factors Overview
Noise factors (robust process engineering) enables you to produce acceptable products reliably, despite variation in the process variables. Even when your experiment has controllable factors, there is a certain amount of uncontrollable variation in the factors that affects the response. This is called transmitted variation. Factors with this variation are called noise factors. You cannot control some factors, like environmental noise factors. The mean for some factors can be controlled, but their standard deviation is uncontrollable. This is often the case for intermediate factors that are output from a different process or manufacturing step.
A good approach to making the process robust is to match the target at the ...

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