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| Criterion |  DevOps Blameless Postmortem |  Product Discovery Product Kata |  DevOps Game Day |  Operations A3 Problem Solving |
|---|---|---|---|---|
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. | In preparing for rare incidents, the method tests response capability under controlled conditions. It shows where assumptions about stability, roles, and recovery are too optimistic. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. |
Complexitydifferent | Medium | Medium | High | Medium |
Timedifferent | 30-90 min | 1-2 Wochen je Loop | Halber Tag | 45-90 min |
Participantsdifferent | 3-12 | 3-10 | 5-20 | 2-5 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Direction, Current metric, Target metric, Experiment note, Learning report | Simulation Notes, Gaps List, Updated Runbooks | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | OutcomesDiscoveryLearningIterationCoaching | ResilienceOperationsIncident | LeanProblem solvingCoachingOperations |