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May 14, 2026Quality and Reliability Engineering International

EWMA Control Chart for Monitoring Circular Data

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Authors

AHAnwaar M. HassanCairo UniversityAAAmani A. AhmedCairo UniversityAAAya A. AlyCairo University

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Implication

Randomized trial evaluates EWMA and Shewhart charts in monitoring circular data, indicating effectiveness in quality control.

Key Points

  • The aim is to assess the effectiveness of EWMA and Shewhart control charts for monitoring circular data.
  • Used EWMA and Shewhart charts for changes in location and concentration of circular data.
  • Evaluated performance via Monte Carlo simulation.
  • Applied charts to real-world data for validation.
  • EWMA chart outperformed Shewhart chart in detecting small to moderate shifts.
  • Both charts exhibited directional invariance for monitoring location with von Mises data.
  • Shewhart chart slightly better for identifying large shifts.

Cite This Study

Hassan et al. (2026) studied this question.

synapsesocial.com/papers/6a0567a8a550a87e60a1fca3https://doi.org/10.1002/qre.70228
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