THE SHEWHART CONTROL CHART - TESTS FOR SPECIAL CAUSES
THE SHEWHART CONTROL CHART - TESTS FOR SPECIAL CAUSES
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DOI：
10.1080/00224065.1984.11978921
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发表时间：
1984-01-01
影响因子：
2.5
通讯作者：
NELSON, LS
中科院分区：
文献类型：
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作者：
NELSON, LS
三年前，为了应用的方便和一致性，我收集了一组可指定原因的检验（图1），用于正态分布数据均值的休哈特控制图。图2是关于这些测试的一组注释。德明（1982）将可归因原因称为”特殊原因”，以便将其与他所谓的”共同原因”进行对比。一个常见的原因是影响图表上的所有点，如中心线过高。一个共同的原因是通过改变制度来解决的。通过消除引起失控信号的扰动影响来修复特殊原因。为了方便我的使用，图1和图2被背靠背地打印在8.5”X 11”的黄色卡片上，并分发给所有应用休哈特图表的区域。主要目标之一是标准化此测试时间表，以便讨论将集中在流程的行为上，而不是应该使用什么测试。此外，控制限值为
THREE years ago, for purposes of convenience and uniformity of application, I collected a set of tests for assignable causes (Figure 1) to be applied to Shewhart control charts for means of normally distributed data. Figure 2 is a set of comments on these tests. Deming (1982) refers to assignable causes as" special causes" in order to contrast them with what he calls" common causes". A common cause is one that affects all the points on the chart, as when a centerline is too high. A common cause is fixed by changing the system. A special cause is fixed by removing the perturbing influence that caused the out-of-control signal. For my use, Figures 1 and 2 were printed backto-back on 8.5" X 11" yellow card stock and issued to all areas where Shewhart charts are applied. One of the main objectives was to standardize on this schedule of tests so that discussion would be focused on the behavior of the process rather than on what test should be used. Further, control limits are