A side sensitive modified group runs control chart to detect shifts in the process mean

M. P. Gadre, K. A. Joshi and R. N. Rattihalli

Journal of Applied Statistics, 2010, vol. 37, issue 12, 2073-2087

Abstract: Gadre and Rattihalli [5] have introduced the Modified Group Runs (MGR) control chart to identify the increases in fraction non-conforming and to detect shifts in the process mean. The MGR chart reduces the out-of-control average time-to-signal (ATS), as compared with most of the well-known control charts. In this article, we develop the Side Sensitive Modified Group Runs (SSMGR) chart to detect shifts in the process mean. With the help of numerical examples, it is illustrated that the SSMGR chart performs better than the Shewhart's X chart, the synthetic chart [12], the Group Runs chart [4], the Side Sensitive Group Runs chart [6], as well as the MGR chart [5]. In some situations it is also superior to the Cumulative Sum chart p9] and the exponentially weighed moving average chart [10]. In the steady state also, its performance is better than the above charts.

Keywords: average time-to-signal; CRL chart; EWMA chart; GR chart; MGR chart; SSGR chart; steady-state ATS; synthetic chart (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1080/02664760903222190

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