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A Control Scheme for High-Yield Correlated Production Under Group Inspection

Summary: [This abstract is based on the authors' abstract.]A control scheme is proposed to detect changes in fraction nonconforming for high-yield processes with correlation within each inspection group. The average run length (ARL) and average time to signal (ATS) are determined using a Markov model. Performance of the proposed scheme in terms of ATS is presented along with a comparison with the traditional cumulative conformance count chart. The effects of correlation and group size are also investigated.

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