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A Multivariate Robust Control Chart for Individual Observations

Summary: [This abstract is based on the authors' abstract.] A robust Hotelling’s T²-type control chart is proposed to monitor individual observations in a multivariate process. The chart is based on reweighted minimum covariance determinant estimators. It is shown how to set the control limits for the proposed chart, and its performance is studied using simulations. A real example illustrates the chart’s performance.

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  • Topics: Statistical Process Control (SPC), Statistics
  • Keywords: Hotelling's T2 statistic, Estimation, Multivariate control charts, Statistical process control (SPC), Outliers, Robust design
  • Author: Chenouri, Shojaeddin; Variyath, Asokan Mulayath; Steiner, Stefan H.
  • Journal: Journal of Quality Technology