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| Criterion |  Operations Root Cause Analysis |  Operations Root Cause Tree Analysis |  DevOps Blameless Postmortem |
|---|---|---|---|
Purposedifferent | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. |
Complexitysame | Medium | Medium | Medium |
Timedifferent | 1-4 h | 1-3 h | 30-90 min |
Participantsdifferent | 3-8 | 2-8 | 3-12 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Cause Tree, Evidence Notes, Countermeasures | Postmortem Doc, Action Items, Timeline |
Tags1 shared | Root causeProblem solvingQualityIncident | Root causeTreeIncidentQuality | Site Reliability EngineeringIncidentLearningReliability |
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