A study of the median run length (MRL) performance of the EWMA t chart for the mean
The exponentially weighted moving average (EWMA) X chart is effective in detecting small shifts. However, the EWMA X chart is not robust enough to prevent errors in estimating the process standard deviation or a changing standard deviation. To overcome this problem, Zhang et al. suggested the EWM...
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Stellenbosch University
2012
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| Online Access: | http://sajie.journals.ac.za/pub/article/view/510 http://sajie.journals.ac.za/pub/article/view/510 http://eprints.usm.my/38208/1/A_STUDY_OF_THE_MEDIAN_RUN_LENGTH_(MRL)_PERFORMANCE_OF_THE_EWMA_t_CHART_FOR_THE_MEAN.pdf |