Characteristics of a fuzzy test system

Stable outgoing quality is assured by using a test system with a fuzzy controller, even when sudden changes of incoming quality occur. Non test is automatically selected, when incoming quality becomes far better than a target quality. The author studies how to check the stability condition of the fuzzy test system. The condition is that the value, the sample size at the t-th test divided by the size of lot products, is smaller than that, the outgoing quality at (t-1)-th test by incoming quality.<
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