Quality Control
1. Revisiting the One-Sided EWMA Control Chart

Duy Duong-Tran; Romina Dastoorian; Lee Wells

Articles in Press, Accepted Manuscript, Available Online from 04 December 2021


  Exponential Weighted Moving Average (EWMA) control charts have been widely used in Statistical Process Control 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. However, ...  Read More