Designing a multivariate EWMA control chart Designing a Multivariate EWMA Control Chart SHARAD S.PRABHU SAS Institute,Cary,NC 27515 GEORGE C.RUNGER Arizona State University,Tempe,AZ 85287-5906 ove the detection AmultivariatentrRecommendations provied for the seon of of the scheme. Introduction proces (198).Pignatielo and Runge 1nCkson19 lootrol a univariate control charts on individual variables. process inean vector jndethecontrol h the charts have been used to improve the detection of of the process. rom targe d denote the knowu covarlance matrix of X:as E.The chi-squared chart plots nd Runger() T=X∑-1X age(MEWMA) Howeve because the analysi iations for designing these schemes has been lim 8Dm。 of the Techuical Staf in the Sta schemes that provides recommendations for 11000 oumal of Quality Technology 8 Vol.9.No.1.January 1997 Reproduced with permission of the copyright owner.Further reproduction prohibited without permission.Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Designing a multivariate EWMA control chart Prabhu, Sharad S; Runger, George C Journal of Quality Technology; Jan 1997; 29, 1; ABI/INFORM Global pg. 8