Cause & Effect Diagram or Fishbone Diagram

A Cause and Effect Diagram is structured brainstorming tool designed to assist an improvement team in listing potential causes of a specific effect. It is also known as an Ishikawa Diagram, for its creator, or a Fishbone Diagram, for its resemblance to the bones of a fish.

Causes are often grouped into major categories, which are classically defined as the 6 Ms: Man/Mind Power (people), Methods (processes), Machines (technology), Materials (raw materials, information, consumables), Measurements (inspection), and Milieu/Mother Nature (environment). An additional 2 Ms are also sometimes used: Management/Money Power and Maintenance.

This tool is used in tandem with The 5 Whys.

Cause & Effect Diagram (Fishbone Diagram) Template

Download Fishbone Diagram Template

Fishbone Diagram -

Download Fishbone Diagram Template

To learn how to use the Fishbone Diagram and how to apply Lean or Six Sigma, check out our Free Lean Six Sigma Yellow Belt TrainingGreen Belt Training or Lean Training.

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