Maravelakis, Petros; Panaretos, John; Psarakis, Stelios - Volkswirtschaftliche Fakultät, … - 2005
The EWMA control chart is used to detect small shifts in a process. It has been shown that, for certain values of the smoothing parameter, the EWMA chart for the mean is robust to non normality. In this article, we examine the case of non normality in the EWMA charts for the dispersion. It is...
