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| Criterion |  DevOps Blameless Postmortem |  Architecture arc42 |  Product Discovery Learning Card |  Product Discovery MVP Test Matrix |
|---|---|---|---|---|
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. | arc42 structures architecture knowledge so teams can document system, decisions, and risks consistently. The template builds a living understanding of the architecture instead of scattered notes. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | 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 | Medium | Low | Low | Medium |
Timedifferent | 30-90 min | 1-2 Tage | 25-40 min | 45-75 min |
Participantsdifferent | 3-12 | 1-4 | 1-5 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Architecture Document, Context View, Runtime View, Deployment View | Learning Card with evidence and next action | Test Matrix, Test Plan |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | ArchitectureDocumentationCommunication | ExperimentsValidationDiscoveryLearning | ExperimentsValidationDiscoveryOptions |