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| Criterion |  DevOps Blameless Postmortem |  Decision Making DACI |  Architecture arc42 |
|---|---|---|---|
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. | In cross-functional decisions, responsibilities quickly blur between approval, influence, and execution. DACI arranges these roles so decision pressure, contribution, and information stay cleanly separated. | 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. |
Complexitydifferent | Medium | Low | Low |
Timedifferent | 30-90 min | 30-60 min | 1-2 Tage |
Participantsdifferent | 3-12 | 2-10 | 1-4 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | DACI Matrix, Decision Owner, Decision Log | Architecture Document, Context View, Runtime View, Deployment View |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | DecisionRolesGovernanceAlignment | ArchitectureDocumentationCommunication |
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