An adaptive multivariate CUSUM control chart for signaling a range of location shifts

Tianhua Wang and Shuguang Huang

Communications in Statistics - Theory and Methods, 2016, vol. 45, issue 16, 4673-4691

Abstract: In this work, we proposed an adaptive multivariate cumulative sum (CUSUM) statistical process control chart for signaling a range of location shifts. This method was based on the multivariate CUSUM control chart proposed by Pignatiello and Runger (1990), but we adopted the adaptive approach similar to that discussed by Dai et al. (2011), which was based on a different CUSUM method introduced by Crosier (1988). The reference value in this proposed procedure was changed adaptively in each run, with the current mean shift estimated by exponentially weighted moving average (EWMA) statistic. By specifying the minimal magnitude of the mean shift, our proposed control chart achieved a good overall performance for detecting a range of shifts rather than a single value. We compared our adaptive multivariate CUSUM method with that of Dai et al. (2001) and the non adaptive versions of these two methods, by evaluating both the steady state and zero state average run length (ARL) values. The detection efficiency of our method showed improvements over the comparative methods when the location shift is unknown but falls within an expected range.

Date: 2016
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DOI: 10.1080/03610926.2014.927494

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