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| Criterion |  Operations After-Action Review |  Architecture Architecture Decision Record |  DevOps Blameless Postmortem |  Architecture arc42 |
|---|---|---|---|---|
Purposedifferent | After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | 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. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 20-45 min | 15-45 min | 30-90 min | 1-2 Tage |
Participantsdifferent | 3-12 | 1-3 | 3-12 | 1-4 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | ADR File, Decision Log, Rationale | Postmortem Doc, Action Items, Timeline | Architecture Document, Context View, Runtime View, Deployment View |
Tagsno overlap | LearningOperationsImprovement | ArchitectureRationaleDocumentationGovernance | Site Reliability EngineeringIncidentLearningReliability | ArchitectureDocumentationCommunication |