The design of a new repetitive sampling control chart based on process capability index

Abstract

Control charts are widely used to monitor manufacturing processes for a deterioration in stability. We propose repetitive group sampling control charts based on the process capability index C pk for monitoring process average when the quality characteristic follows a normal distribution. The performance of the repetitive C pk control chart is reported and compared with the existing control chart in terms of the average run length. It is found that the proposed control chart is effective for quickly detecting small shifts in the process mean.

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