The control limits are set such that ARL0 = 370 for which the control limits multiplier for the proposed NPDEWMA chart L = 0:284 is used.
The charting statistics are plotted against these control limits.
The same is done for the dataset under discussion, in the three other competing control charts NPSE, NPASE and NPSC of this study.
The resulting control chart displays are shown in Figure 7 for all the four charts.
We observed that the proposed NPDEWMA chart gives six out-of-control signals for
the location parameter.
The other charts show the out-of-control signals as: NPSE three, NPASE one and NPSC none. This detection ability in the example data set is in agreement with the dominance order that the previous section establishes.