Communications for Statistical Applications and Methods

The Korean Statistical Society (한국통계학회)
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Multivariate EWMA Control Charts for Monitoring Dispersion Matrix

  • Chang Duk-Joon (Dept. of Statistics, Changwon National University) ;
  • Lee Jae Man (Dept. of Information Statistics, Andong National University)
  • Published : 2005.08.01
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Abstract

In this paper, we proposed multivariate EWMA control charts for both combine-accumulate and accumulate-combine approaches to monitor dispersion matrix of multiple quality variables. Numerical performance of the proposed charts are evaluated in terms of average run length(ARL). The performances show that small smoothing constants with accumulate-combine approach is preferred for detecting small shifts of the production process.

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References

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