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| Criterion |  DevOps Blameless Postmortem |  Product Discovery Product Kata |  Product Discovery Learning Card |  Product Discovery Experiment Canvas |
|---|---|---|---|---|
Purposedifferent | 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. | Product Kata helps clarify customer problems, solution ideas, and evidence through a repeatable improvement routine. It captures direction, current metric, target metric, experiment notes, and learning. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | 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. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 30-90 min | 1-2 Wochen je Loop | 25-40 min | 30-60 min |
Participantsdifferent | 3-12 | 3-10 | 1-5 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Direction, Current metric, Target metric, Experiment note, Learning report | Learning Card with evidence and next action | Completed Experiment Canvas, Success Metric |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | OutcomesDiscoveryLearningIterationCoaching | ExperimentsValidationDiscoveryLearning | ExperimentsValidationDiscoveryHypothesis |