Khoo, Michael B. C. and Atta, Abdu M. A. (2008) *An EWMA Control Chart for Monitoring the Mean of Skewed Populations Using Weighted Variance.* In: Proceedings of the 2008 IEEE IEEM, 8-11 December 2008, Singapore.

## Abstract

This paper discusses the use of weighted variance (wv) in setting up the limits of the exponentially weighted moving average (EWMA) chart for the monitoring of the mean of a process from a skewed population. This chart, called the WV-EWMA chart hereafter, reduces to the standard EWMA chart when the underlying distribution is symmetric.

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