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A Comparative Study of CUSUM and EWMA Charts: Detection of Incipient Drifts in a Multivariate Framework

Summary: [This abstract is based on the authors' abstract.]A multivariate control chart in the case of incipient process drift is discussed. The design of the chart is based on the assumption that the process operation states are known and available. A multimodal T2 hoteling statistic and a dynamic model of the drift enable detection of the direction of drift.

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  • Topics:
  • Keywords: Cumulative sum control chart (CUSUM),Event detection,Exponentially weighted moving average control charts (EWMA),Hotelling's T2 statistic,Statistical process control (SPC) Multivariate control charts
  • Author: Boudaoud, Nassim; Cherfi, Zohra
  • Journal: Quality Engineering