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| Criterion |  Operations After-Action Review |  DevOps Blameless Postmortem |  Agile Bucket System |  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 a large batch of work needs a fast, rough estimate, it sorts items into predefined size buckets. It sorts work by value, risk, and delivery ability. The result is captured as a Bucketed Backlog, Relative Estimates, and Split Candidates. | 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 | Medium |
Timedifferent | 20-45 min | 30-90 min | 30-90 min | 30-90 min |
Participantssame | 3-12 | 3-12 | 3-12 | 3-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Lessons learned, Action items, Event summary | Postmortem Doc, Action Items, Timeline | Bucketed Backlog, Relative Estimates, Split Candidates | Affinity Size Map, Grouped Estimates, Unclear Items |
Tagsno overlap | LearningOperationsImprovement | Site Reliability EngineeringIncidentLearningReliability | EstimationBacklogRelative sizing | EstimationBacklogRelative sizing |