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A Combined Upper-Sided Synthetic S 2 Chart for Monitoring the Process Variance

Author

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  • Tingting Shan
  • Liusan Wu
  • Xuelong Hu

Abstract

In order to monitor the process variance, this paper proposes a combined upper-sided synthetic S 2 chart for monitoring the process standard deviation of a normally distributed process. This combined upper-sided synthetic S 2 chart comprises a synthetic chart and an upper-sided S 2 chart. The design and performance of the proposed chart are presented, and the steady-state average run length comparisons show that the combined upper-sided synthetic S 2 chart outperforms the standard synthetic S 2 chart as well as several run rules S 2 charts, especially for larger shifts in the process variance.

Suggested Citation

  • Tingting Shan & Liusan Wu & Xuelong Hu, 2020. "A Combined Upper-Sided Synthetic S 2 Chart for Monitoring the Process Variance," Mathematical Problems in Engineering, Hindawi, vol. 2020, pages 1-6, June.
    • Handle: RePEc:hin:jnlmpe:9102059
    DOI: 10.1155/2020/9102059
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