Quality Control
Revisiting the one-sided EWMA control chart

Duy Duong-Tran; Romina Dastoorian; Lee Wells

Volume 9, Issue 2 , June 2022, , Pages 151-164


  Exponential Weighted Moving Average (EWMA) control charts have been widely used in Statistical Process Control (SPC) to detect small and persistent process shifts. In theory, EWMA control limits monotonically increase over time to account for the continual growth of the EWMA statistic’s variance. ...  Read More