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Wilcoxon-Type Control Charts Based on Multiple Scans

Author

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  • Ioannis S. Triantafyllou

    (Department of Statistics and Insurance Science, University of Piraeus, 18534 Piraeus, Greece)

Abstract

In this article, we establish new distribution-free Shewhart-type control charts based on rank sum statistics with signaling multiple scans-type rules. More precisely, two Wilcoxon-type chart statistics are considered in order to formulate the decision rule of the proposed monitoring scheme. In order to enhance the performance of the new nonparametric control charts, multiple scans-type rules are activated, which make the proposed chart more sensitive in detecting possible shifts of the underlying distribution. The appraisal of the proposed monitoring scheme is accomplished with the aid of the corresponding run length distribution under both in- and out-of-control cases. Thereof, exact formulae for the variance of the run length distribution and the average run length (ARL) of the proposed monitoring schemes are derived. A numerical investigation is carried out and depicts that the proposed schemes acquire better performance towards their competitors.

Suggested Citation

  • Ioannis S. Triantafyllou, 2024. "Wilcoxon-Type Control Charts Based on Multiple Scans," Stats, MDPI, vol. 7(1), pages 1-16, March.
    • Handle: RePEc:gam:jstats:v:7:y:2024:i:1:p:18-316:d:1353312
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    References listed on IDEAS

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    1. Sh. Nasrollahzadeh & M. Bameni Moghadam & R. Farnoosh, 2023. "A Shewhart-type nonparametric multivariate depth-based control chart for monitoring location," Communications in Statistics - Theory and Methods, Taylor & Francis Journals, vol. 52(20), pages 7385-7404, October.
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