Process capability index for multivariate quality characteristics is a problem that is not solved well.
多元质量特性过程能力指数是一个尚未得到很好解决的问题。
The standard deviation in Process Capability Index(PCI) is estimated by using the subgroup ranges or the sample standard deviation.
在过程能力分析中通常采用子样级差或样本总体标准差来估计总体标准差。
Therefore, the study on construction and appraisal of process capability index for non-normal processes is a hot issue to be solved.
目前非正态过程能力指数的构建与评价研究是过程能力研究中的热点问题。
Then three different definitions of multivariate process capability index are presented, such as based on direct zone, modified tolerance zone and modified process zone.
应用主成份分析基本方法，结合单质量特性工序能力指数，给出了多质量特性的主成份的工序能力指数。
The essay narrates briefly the traditional definition and the unreasonableness of process capability index, and the source is that the definition of shift coefficient has defect.
本文简述工序能力指数的传统定义及其不合理性，其根源是偏移系数的定义有缺陷。
In this paper, the definition of process capability and calculation method of process capability index, and how to control the process quality in motors batch production are introduced.
文章介绍了工序能力的定义和工序能力指数的计算方法，以及在电机批量生产中如何对工序质量加以控制。
The study of multivariate process capability index is one of the difficulties in the process control and is also question which domestic and foreign experts and scholars have paid attention to.
多元工序能力指数的研究是近年来工序控制中的难点之一，也是国内外专家、学者普遍关注的问题。
The study of multivariate process capability index is one of the difficulties in the process control and is also question which domestic and foreign experts and scholars have paid attention to.
多元工序能力指数的研究是近年来工序控制中的难点之一，也是国内外专家、学者普遍关注的问题。
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