Fishbone analysis organises potential causes of a defined problem into categories displayed as branches. It structures root-cause discussion and identifies hypotheses requiring evidence.
How to use this tool
Define the problem clearly
Define the problem clearly.
Select cause categories
Select suitable cause categories.
Add contributing factors
Add potential causes and contributing factors.
Test with evidence
Test the most likely causes using evidence.
References & further reading
Ishikawa, K. (1985). What Is Total Quality Control? The Japanese Way. Prentice-Hall.