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| Criterion |  Operations A3 Problem Solving |  Operations After-Action Review |  Operations Learning Review |  DevOps Blameless Postmortem |
|---|---|---|---|---|
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 missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. | After a project phase with mixed results, the method makes learning from the individual case reusable. It connects events, decisions, and systemic conditions into robust insights. | 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 | Medium | Low | Medium | Medium |
Timedifferent | 45-90 min | 20-45 min | 1-3 h | 30-90 min |
Participantsdifferent | 2-5 | 3-12 | 3-10 | 3-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Lessons learned, Action items, Event summary | Learning Review Notes, System Factors, Improvement Actions | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | LeanProblem solvingCoachingOperations | LearningOperationsImprovement | LearningRetrospectiveIncidentOperations | Site Reliability EngineeringIncidentLearningReliability |