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M6Q1: Why the non-Schwhart control charts are required to be set up?
ANS: The Shewhart control charts are relative insensitive to small shifts in the process mean, but the non-Shewhart control charts are expected to detect the small shifts in the process mean.
M6Q2: Which one is the least effective in detecting small shift in the process mean: Cusum control chart, MA control chart, and EWMA control chart?
ANS: The MA control chart is generally found to be the least effective among the three in detecting small shift in the process mean.
M6Q3: Which one is the most effective in detecting small shift in the process mean: Cusum control chart, MA control chart, and EWMA control chart?
ANS: The EWMA control chart and Cusum control charts can be made comparable depending upon the choice of parameters of the control charts.
M6Q4: What is the equivalence of MA control chart and EWMA control charts?
ANS: If /\\=2/(w+1) for the EWMA control chart then it is equivalent to a w-period moving average control chart in the sense that the control limits are identical in steady state.
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