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A critical note on the exponentiated EWMA chart

Author

Listed:
  • Abdul Haq

    (Quaid-i-Azam University)

  • William H. Woodall

    (Virginia Tech)

Abstract

In this short note, we reevaluate the run-length performance of the EWMA and exponentiated EWMA (Exp-EWMA) charts using the conditional expected delay metric. It is found that the enhancements offered by the Exp-EWMA chart over the EWMA chart in the zero-state setup are marginal. Given its simplicity in implementation and its ability to encompass the functionality of the Exp-EWMA chart in detecting delayed shifts in the process mean, the EWMA chart remains the preferred choice over the Exp-EWMA chart.

Suggested Citation

  • Abdul Haq & William H. Woodall, 2024. "A critical note on the exponentiated EWMA chart," Statistical Papers, Springer, vol. 65(8), pages 5379-5387, October.
    • Handle: RePEc:spr:stpapr:v:65:y:2024:i:8:d:10.1007_s00362-024-01601-w
    DOI: 10.1007/s00362-024-01601-w
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    References listed on IDEAS

    as
    1. Seven Knoth, 2005. "Fast initial response features for EWMA control charts," Statistical Papers, Springer, vol. 46(1), pages 47-64, January.
    2. Vasileios Alevizakos & Arpita Chatterjee & Kashinath Chatterjee & Christos Koukouvinos, 2024. "The exponentiated exponentially weighted moving average control chart," Statistical Papers, Springer, vol. 65(6), pages 3853-3891, August.
    Full references (including those not matched with items on IDEAS)

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