製程能力指標是製程品質特性相關分配之參數的函數。製程能力指標C/sub p/, C/sub pk/及C/sub pm/已經廣泛地被製造業用來評估製程是否達到製造規格或品質的要求，是一個容易運用的績效評估工具。對於製程能力指標的研究大多數集中於點估計，由於抽樣誤差的忽略易導致指標估計值的不可靠。在本文中，針對這些指標提供另一種簡易方便可靠的方法以評估製程的績效。 A process capability index is a function of some parameters of some involved distribution and it specifies a quality characteristic. The process capability indices C/sub p/, C/sub pk/ and C/sub pm/ have been used in manufacturing industries to provide a quantitative measurement of the potential and performance of the manufacturing. These indices are easy to apply. Most studied on process capability indices are focusing on point estimates, which may result in misleading assessments of process performance. In this paper, we consider C/sub p/, C/sub p/ and C/sub pm/ , and develop a simple and convenient procedure for decision making in assessing process capability.
