非正态香精过程能力指数计算方法研究

Study on estimation of process capability index of flavor with non-normal distribution

对加工过程进行过程能力指数计算的基本假设是过程受控和数据服从正态分布。但在实际工作中经常出现数据不服从正态分布的现象,这使得传统的过程能力指数度量失准。本文在简单介绍过程能力指数发展史的基础上,提出了一种基于MINITAB的简易计算过程能力指数的方法,并结合香精香料生产过程进行了实证。

The basic assumptions to calculation the process capability index are steady process and normal distribution data. In practice, however, in many steady processes, quality measurements are not subject to normal distribution. Base on the development of process capability index, a method of calculation the process capability index with non-normal distribution by using Minitab is presented. An example of flavor process is demonstrated.