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| Criterion |  Operations 5 Whys |  DevOps Blameless Postmortem |
|---|---|---|
Purposedifferent | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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. |
Complexitydifferent | Low | Medium |
Timedifferent | 15-30 min | 30-90 min |
Participantsdifferent | 2-6 | 3-12 |
Formatdifferent | Workshop | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | Postmortem Doc, Action Items, Timeline |
Tags1 shared | Root causeIncidentLeanProblem solving | Site Reliability EngineeringIncidentLearningReliability |
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