http://www.mindtools.com/pages/article/newTMC_80.htm

1. Define the Problem
2. Collect Data
3. Identify Possible Causal Factors
4. Identify the Root Cause(s)
5. Recommend and Implement

Identify the Root Cause

• Appreciation – Use the facts and ask "So what?" to determine all the possible consequences of a fact.
• Practice 5 times why the problem exists