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| Criterion |  Operations After-Action Review |  DevOps Blameless Postmortem |  Agile Affinity Estimation |
|---|---|---|---|
Purposedifferent | 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 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 many tasks need to be classified quickly, it sorts them by perceived effort and similarity. It reduces the effort of fine-grained estimation for large volumes. |
Complexitydifferent | Low | Medium | Medium |
Timedifferent | 20-45 min | 30-90 min | 30-90 min |
Participantssame | 3-12 | 3-12 | 3-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Lessons learned, Action items, Event summary | Postmortem Doc, Action Items, Timeline | Affinity Size Map, Grouped Estimates, Unclear Items |
Tagsno overlap | LearningOperationsImprovement | Site Reliability EngineeringIncidentLearningReliability | EstimationBacklogRelative sizing |
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