The Continuous Run Sum Chart

Cesar A. Acosta-Mejia and Luis Rincon

Communications in Statistics - Theory and Methods, 2014, vol. 43, issue 20, 4371-4383

Abstract: The run sum chart is an effective two-sided chart that can be used to monitor for process changes. It is known that it is more sensible than the Shewhart chart with runs rules and its performance improves as the number of regions increases. However, as the number of regions increses the resulting chart has more parameters to be defined and its design becomes more involved. In this article, we introduce a one-parameter run sum chart. This chart accumulates scores equal to the subgroup means and signals when the cummulative sum exceeds a limit value. A fast initial response feature is proposed and its run length distribution function is found by a set of recursive relations. We compare this chart with other charts suggested in the literature and find it competitive with the CUSUM, the FIR CUSUM, and the combined Shewhart FIR CUSUM schemes.

Date: 2014
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DOI: 10.1080/03610926.2012.721913

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