Six Sigma SPC's Quality Control Dictionary and Glossary
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Cause and Effect diagram

Also called a "Fishbone Diagram", (shape looks like a fish with the head being on the right and the tail on the left), or "Ishikawa Diagram", (created by Kaoru Ishikawa). Tool used to make assumptions of the root-cause and/or potential or common causes, for a specific effect. Embraced for use in six sigma, among other types of project management.

Create to list all possible reasons for any given conclusion. These types of diagrams can identify the most likely reasons of a result. organization

Diagram was embrace by Deming as a beneficial tool for quality and process improvement models. Ishikawa, Deming, and many others use these diagrams as a ‘first tool’ in any quality management process.

Ishikawa Diagram above from Quality Planning and Analysis, Juran and Gryna, 2nd edition.

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