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Articles
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QICID: 30227
Title: A Multivariate Robust Control Chart for Individual Observations
Copyright: ASQ
Author: Chenouri, Shojaeddin; Variyath, Asokan Mulayath; Steiner, Stefan H.
Organization: University of Waterloo; Memorial University of Newfoundland
Subject: Hotelling's T2 statistic; Estimation; Multivariate control charts; Statistical process control (SPC); Outliers; Robust design;
Series: Journal of Quality Technology, Vol. 41, No. 3, July 2009, pp. 259-271
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Abstract: [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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