判异准则在标准差控制图上的应用

Application of the Eight Criteria for Determinig the Singularity in Standard Deviation Charts

在标准差控制图的八个判异准则基础上,提出了相应的非对称标准差控制图的判异准则,分别给出了它们的实际报警率,并讨论了八个准则应用在标准差控制图时的平均运行长度。

We propose the eight criteria for determining the singularity of asymmetrical standard deviation charts based on the eight criteria for determining the singularity of chart in this article and work out their alert rates. We also compare them with the standard deviation chart of National Standard in the respect of Average Run Length (ARL). Unbiased control chart is the most attractive because of the good characteristic of unbiased.