The cause-and-effect diagram is one of the seven basic quality improvement tools, and this article will illustrate its synergy with the affinity diagram. The article will then discuss how modern computer technology can enhance both techniques to create keyword-searchable quality records that support related projects.

The Six Sigma body of knowledge includes the Seven Management and Planning Tools. Among them is the affinity diagram or KJ Method, named after Jiro Kawakita, Ph.D. It is a brainstorming or discussion tool in which participants write thoughts on three-by-five cards or sticky notes, and then organize the cards according to categories.

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