Why - Decision Tree Diagram
Diagram a decision tree of the causes.
A Why-Decision Tree is a decision analysis tool that uses a tree-like diagram of decisions and their possible consequences.
To create a Why-Decision Tree Diagram:
Step 1: State the problem on the left side of a sheet of paper.
Step 2: Create a decision tree of causes to the right of the problem by asking:
- A succession of 'Whys' (Why is this happening? Why is it a problem?) regarding the problem.
- A succession of 'Whys' for each of the possible causes.
Step 3: Continue the process until each strand of the problem is teased out as far as possible. Use the Five Whys technique.
Step 4: Analyze the decision tree diagram to identify main issues and to restate the problem in terms of its root causes.