005·76
root cause analysis
/ruːt kɔːz əˈnæl.ɪ.sɪs/ - n.
1 [colloq.] The search for the underlying cause, which terminates the moment it reaches a team that can defend itself.Keep. Punchy.This is the problem.
Working definition
2. The disciplined investigation that traces a quality failure back from its symptom to the underlying defect in process, system, or definition that produced it.