Economic statistical process control for multivariate quality characteristics under Weibull shock model

This paper is an extension of research conducted by Banerjee and Rahim (Technometrics 29(6) (1988) 404). Their general approach is now applied to a multivariate control chart instead of a univariate control chart. A cost model for the economic statistical design of a Hotelling T2 control chart is derived to deal with situations involving a Weibull shock model with an increasing failure rate. Application of the proposed T2 control chart design is demonstrated through a numerical example. A sensitivity analysis of the model is performed.