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| Criterion |  Architecture Architecture Decision Record |  Agile Sprint Retrospective |  DevOps Blameless Postmortem |  Architecture arc42 |
|---|---|---|---|---|
Purposedifferent | 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. | When a sprint is over and friction shouldn't simply be carried forward, it opens the view onto collaboration and patterns. It creates space to see causes and changes together. | 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 | 15-45 min | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 30-90 min | 1-2 Tage |
Participantsdifferent | 1-3 | Scrum Team | 3-12 | 1-4 |
Formatdifferent | Async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Improvement actions, Team agreements | Postmortem Doc, Action Items, Timeline | Architecture Document, Context View, Runtime View, Deployment View |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | RetrospectiveImprovementLearning | Site Reliability EngineeringIncidentLearningReliability | ArchitectureDocumentationCommunication |