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| Criterion |  Product Discovery Learning Card |  DevOps Blameless Postmortem |  Operations Learning Review |  Product Discovery MVP Test Matrix |
|---|---|---|---|---|
Purposedifferent | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | 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. | After a project phase with mixed results, the method makes learning from the individual case reusable. It connects events, decisions, and systemic conditions into robust insights. | When several minimal variants compete to answer the same question, it makes comparing and choosing between them cleaner. It separates problem, assumption, solution, and evidence. The result is captured as a Test Matrix and a Test Plan. |
Complexitydifferent | Low | Medium | Medium | Medium |
Timedifferent | 25-40 min | 30-90 min | 1-3 h | 45-75 min |
Participantsdifferent | 1-5 | 3-12 | 3-10 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Learning Card with evidence and next action | Postmortem Doc, Action Items, Timeline | Learning Review Notes, System Factors, Improvement Actions | Test Matrix, Test Plan |
Tagsno overlap | ExperimentsValidationDiscoveryLearning | Site Reliability EngineeringIncidentLearningReliability | LearningRetrospectiveIncidentOperations | ExperimentsValidationDiscoveryOptions |