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On the improvement of one-sided S control charts

机译:关于单面S控制图的改进

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摘要

The most common charting procedure used for monitoring the variance of the distribution of a quality characteristic is the S control chart. As a Shewhart-type control chart, it is relatively insensitive in the quick detection of small and moderate shifts in process variance. The performance of the S chart can be improved by supplementing it with runs rules or by varying the sample size and the sampling interval. In this work, we introduce and study one-sided adaptive S control charts, supplemented or not with one powerful runs rule, for detecting increases or decreases in process variation. The properties of the proposed control schemes are obtained by using a Markov chain approach. Furthermore, a practical guidance for the choice of the most suitable control scheme is also provided.
机译:用于监视质量特征分布变化的最常见制图程序是S控制图。作为Shewhart型控制图,它在快速检测过程方差的小而中等变化时相对不敏感。 S图的性能可以通过添加运行规则或通过更改样本大小和采样间隔来提高。在这项工作中,我们将介绍和研究单侧自适应S控制图,以补充或不补充一种有效的运行规则,以检测过程变化的增加或减少。所提出的控制方案的性质是通过使用马尔可夫链方法获得的。此外,还提供了有关选择最合适的控制方案的实用指南。

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