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| Criterion |  Operations A3 Problem Solving |  DevOps Blameless Postmortem |  Agile 4Ls Retrospective |  Agile Mad Sad Glad |
|---|---|---|---|---|
Purposedifferent | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. | 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 | Medium | Low | Low |
Timedifferent | 45-90 min | 30-90 min | 45–75 min | 30-60 min |
Participantsdifferent | 2-5 | 3-12 | Team members involved | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Postmortem Doc, Action Items, Timeline | 4Ls Board, Learning Themes, Improvement Actions | Emotion Board, Themes, Action Items |
Tagsno overlap | LeanProblem solvingCoachingOperations | Site Reliability EngineeringIncidentLearningReliability | RetrospectiveLearningReflectionTeam | RetrospectiveTeamReflection |