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| Criterion |  Operations Visual Management |  DevOps Blameless Postmortem |  Product Discovery Test Card |  Product Discovery Learning Card |
|---|---|---|---|---|
Purposedifferent | With high tempo and many parallel topics, the method makes status, deviations, and priorities visible at a glance. It reduces search effort and prevents what matters from getting lost in daily work. | 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 Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. |
Complexitydifferent | Low | Medium | Low | Low |
Timedifferent | Ongoing | 30-90 min | 20-35 min | 25-40 min |
Participantsdifferent | 1-20 | 3-12 | 1-5 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Visual Board, Status Indicators, Exception Cues | Postmortem Doc, Action Items, Timeline | Test Card with a pre-set threshold | Learning Card with evidence and next action |
Tagsno overlap | SignalsOperationsVisual management | Site Reliability EngineeringIncidentLearningReliability | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryLearning |