Communications for Statistical Applications and Methods

The Korean Statistical Society (한국통계학회)
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Estimation of the Change Point in VSS X Control Charts

  • Lee, Jaeheon (Department of Industrial Information Engineering, Gwangju University) ;
  • Park, Changsoon (Department of Mathematics and Statistics, Chung-Ang University)
  • Published : 2003.12.01
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Abstract

Knowing the time of the process change could lead to quicker identification of the responsible special cause and less process down time, and it could help to reduce the probability of incorrectly identifying the special cause. In this paper, we propose a maximum likelihood estimator of the process change point when a Shewhart $\bar{X}$ chart with variable sample size (VSS) scheme signals a change in the process mean. Also we build a confidence interval for the process change point by using the likelihood function.

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References

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