A Control Chart Based on Ranks

Article

Hackl, Peter; Ledolter, Johannes   (1991, ASQC)   School of Business, University of Vienna, Austria

Journal of Quality Technology    Vol. 23    No. 2
QICID: 11323    April 1991    pp. 117-124
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Article Abstract

A control chart technique that considers exponentially weighted moving averages (EWMA) of the ranks of the observations is proposed. This nonparametric technique is outlier-resistant and performs well if one is concerned about sudden shifts in the process mean. The procedure is illustrated on a data set taken fromthe literature.

Keywords

Exponentially weighted moving average control charts (EWMA),Nonparametric methods,Shewhart control chart,Run length,Ordering


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