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| Criterion |  Agile Sprint Retrospective |  Architecture Architecture Decision Record |  Architecture C4 Model |
|---|---|---|---|
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. | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. |
Complexitysame | Low | Low | Low |
Timedifferent | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 15-45 min | 1-4 h |
Participantsdifferent | Scrum Team | 1-3 | 1-5 |
Formatdifferent | Workshop | Async | Workshop + async |
Outputdifferent | Improvement actions, Team agreements | ADR File, Decision Log, Rationale | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | RetrospectiveImprovementLearning | ArchitectureRationaleDocumentationGovernance | ArchitectureCommunicationVisualization |
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