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| Criterion |  Operations After-Action Review |  Product Discovery Experiment Canvas |  DevOps Blameless Postmortem |  Product Discovery Hypothesis Prioritization Canvas |
|---|---|---|---|---|
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. | When experiments become unreadable after the fact, it arranges hypothesis, signal, and learning goal on a single canvas. It separates problem, assumption, solution, and evidence. The result is captured as a Completed Experiment Canvas and a Success Metric. | 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 hypotheses compete for attention, it brings order to their learning sequence and importance. It separates problem, assumption, solution, and evidence. The result is captured as a prioritization canvas and a hypothesis backlog. |
Complexitydifferent | Low | Low | Medium | Medium |
Timedifferent | 20-45 min | 30-60 min | 30-90 min | 60-90 min |
Participantsdifferent | 3-12 | 1-5 | 3-12 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Lessons learned, Action items, Event summary | Completed Experiment Canvas, Success Metric | Postmortem Doc, Action Items, Timeline | Prioritization Canvas, Hypothesis Backlog |
Tagsno overlap | LearningOperationsImprovement | ExperimentsValidationDiscoveryHypothesis | Site Reliability EngineeringIncidentLearningReliability | ExperimentsPrioritizationDiscoveryHypothesis |