Chakraborty, NiladriChakraborti, SubhabrataHuman, Schalk WilliamBalakrishnan, N.2017-03-312016-12Chakraborty, N, Chakraborti, S, Human, SW & Balakrishnan, N 2016, 'A generally weighted moving average signed-rank control chart', Quality and Reliability Engineering International, vol. 32, no. 8, pp. 2835-2845.0748-8017 (print)1099-1638 (online)10.1002/qre.1968http://hdl.handle.net/2263/59603The idea of process monitoring emerged so as to preserve and improve the quality of a manufacturing process. In this regard, control charts are widely accepted tools in the manufacturing sector for monitoring the quality of a process. However, a specific distributional assumption for any process is restrictive and often criticised. Distribution-free control charts are efficient alternatives when information on the process distribution is partially or completely unavailable. In this article, we propose a distribution-free generally weighted moving average (GWMA) control chart based on the Wilcoxon signed-rank (SR) statistic. Extensive simulation is done to study the performance of the proposed chart. The performance of the proposed chart is then compared to a number of existing control charts including the parametric GWMA chart for subgroup averages, a recently proposed GWMA chart based on the sign statistic and an exponentially weighted moving average (EWMA) chart based on the signed-rank statistic. The simulation results reveal that the proposed chart performs just as well and in many cases better than the existing charts, and therefore can serve as a useful alternative in practice.en© 2016 John Wiley & Sons, Ltd. This is the pre-peer reviewed version of the following article : A generally weighted moving average signed-rank control chart, Quality and Reliability Engineering International, vol. 32, no. 8, pp. 2835-2845, 2016. doi : 10.1002/qre.1968. The definite version is available at : http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-1638.Control chartDistribution-freeAverage run-lengthSigned-rank statisticGenerally weighted moving average (GWMA)Exponentially weighted moving average (EWMA)Postprint Article