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| Criterion |  Operations After-Action Review |  Product Discovery Experiment Canvas |  DevOps Blameless Postmortem |  Product Discovery Learning Card |
|---|---|---|---|---|
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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 20-45 min | 30-60 min | 30-90 min | 25-40 min |
Participantsdifferent | 3-12 | 1-5 | 3-12 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | Completed Experiment Canvas, Success Metric | Postmortem Doc, Action Items, Timeline | Learning Card with evidence and next action |
Tagsno overlap | LearningOperationsImprovement | ExperimentsValidationDiscoveryHypothesis | Site Reliability EngineeringIncidentLearningReliability | ExperimentsValidationDiscoveryLearning |