Abstract

Dorian Shainin’s group comparison procedure is a way to find the dominant cause(s) of variation in a process, based on an investigation plan that exploits the idea of leveraging. In this paper, we study whether Shainin’s procedure is sound. Our main finding is that Shainin’s procedure is unreliable in identifying the dominant cause, and in addition, the procedure is inefficient. We propose a new efficient and sound analysis procedure based on the method of maximum likelihood. A critical evaluation shows our proposed method is superior. We also provide a tangible example and compare both methods’ outcomes.

中文翻译：

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使用杠杆研究设计确定主要原因

摘要

Dorian Shainin 的组比较程序是一种基于利用杠杆思想的调查计划来查找过程中变异的主要原因的方法。在本文中，我们研究谢宁的程序是否合理。我们的主要发现是，Shainin 的程序在确定主要原因方面不可靠，此外，该程序效率低下。我们提出了一种基于最大似然法的新的有效且可靠的分析程序。批判性评估表明我们提出的方法是优越的。我们还提供了一个切实的例子并比较了两种方法的结果。