دراسة مقارنة للتاثير المزدوج للانحراف في متوسط العملية والانحراف المعياري في بعض من لوحات السيطرة على طول التشغيل

Abstract

In this study, we deals with analysis stochastic properties the run length of control charts, we investigate the double effect of the shift in the process mean and the standard deviation on the run length of the and EWMA control charts to detect the shift for the process mean, when the random variable is normally distributed which is to be controlled with studying case.