Process capability analysis chart with the application of<b><i>C_pm</i></b>

Abstract

Process capability analysis (PCA) is a highly effective means of assessing the process ability of product that meets specifications. The process capability analysis chart (PCAC/Cpk ) evaluates the capabilities of multiprocess products together with nominal-the-best specifications, larger-the-better and smaller-the-better specifications. This study proposes process capability analysis chart (PCAC/Cpm ) to consider process yield and expected process loss. A new generated estimator for Cpm is proposed and the properties of statistical estimator and hypothesis test are discussed. A practical example was given for application.