The design structure of the proposed NPDEWMA chart depends on the sample size n and the smoothing constant .
The controlling coefficients L are worked out in irder to fix ARL0 at the prespecified level.
Also, the control limits are developed for the proposed chart to improve the monitoring of process location when the parametric distribution of the quality characteristic of interest is not known.
The performance of the proposed chart is evaluated in terms of different run length properties, including ARL, SDRL and some useful percentile points.
The EQL measure is also computed as an overall performance measure of the proposed chart.