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

Author:

Ahmad Liaquat1,Aslam Muhammad2,Jun Chi-Hyuck3

Affiliation:

1. Department of Statistics and Computer Science, University of Veterinary and Animal Sciences, Lahore, Pakistan

2. Department of Statistics, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia

3. Department of Industrial and Management Engineering, POSTECH, Pohang, Republic of Korea

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 Cpk for monitoring process average when the quality characteristic follows a normal distribution. The performance of the repetitive Cpk 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.

Publisher

SAGE Publications

Subject

Instrumentation

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