Affinity diagrams are used to do a high-level organization of the ideas and the fishbone diagram is used to drill down and do root cause analysis. This is typically done in the Analyze phase of ...

Key Points Fishbone diagrams are an effective way to brainstorm root causes for a potential problem. They are especially useful when there isn’t much data available to analyze the problem.

and the root-cause analysis technique form a foundation for effective problem solving. you will also learn how to use additional problem solving tools, including Pareto charts and fishbone diagrams.

After completing the Fishbone Diagram ... when an alleged expert prescribes the Five Whys as part of a root cause analysis, ask their permission if they could go beyond the Five Whys.