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| Criterion |  DevOps Blameless Postmortem |  Agile 4Ls Retrospective |  Operations 8D Problem Solving |  Agile Mad Sad Glad |
|---|---|---|---|---|
Purposedifferent | 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. | When a sprint should not only be assessed but also learned from, it captures experience in clear learning categories. It records what worked, what's missing, and what should run differently next time. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | When a team's or workshop's mood needs to become readable, it structures emotional signals with little setup. It makes strain, relief, and sources of energy tangible. |
Complexitydifferent | Medium | Low | High | Low |
Timedifferent | 30-90 min | 45–75 min | 1-6 Wochen | 30-60 min |
Participantsdifferent | 3-12 | Team members involved | 4-10 | 3-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | 4Ls Board, Learning Themes, Improvement Actions | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Emotion Board, Themes, Action Items |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | RetrospectiveLearningReflectionTeam | QualityProblem solvingRoot cause | RetrospectiveTeamReflection |