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| Criterion |  Agile Sprint Retrospective |  Architecture Architecture Decision Record |  Architecture arc42 |  Agile 4Ls Retrospective |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | 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. | When a sprint should not only be assessed but also learned from, it captures experience in clear learning categories. It records what worked, what's missing, and what should run differently next time. |
Complexitysame | Low | Low | Low | Low |
Timedifferent | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 15-45 min | 1-2 Tage | 45–75 min |
Participantsdifferent | Scrum Team | 1-3 | 1-4 | Team members involved |
Formatdifferent | Workshop | Async | Workshop + async | Workshop |
Outputdifferent | Improvement actions, Team agreements | ADR File, Decision Log, Rationale | Architecture Document, Context View, Runtime View, Deployment View | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | RetrospectiveImprovementLearning | ArchitectureRationaleDocumentationGovernance | ArchitectureDocumentationCommunication | RetrospectiveLearningReflectionTeam |