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| Criterion |  Architecture Architecture Decision Record |  Agile 4Ls Retrospective |  Agile Starfish Retrospective |  Agile Start Stop Continue |
|---|---|---|---|---|
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 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. | When improvement options need to be sorted more finely than just start and stop, it brings observations into clear kinds of action. This makes visible what should be done more, less, newly, or continued. | When a team wants to deliberately adjust its working behavior, it makes habits visible and assessable. It focuses on concrete changes instead of diffuse mood. |
Complexitysame | Low | Low | Low | Low |
Timedifferent | 15-45 min | 45–75 min | 45-90 min | 30-60 min |
Participantsdifferent | 1-3 | Team members involved | 4-12 | 3-12 |
Formatdifferent | Async | Workshop | Workshop | Workshop |
Outputdifferent | ADR File, Decision Log, Rationale | 4Ls Board, Learning Themes, Improvement Actions | Starfish Board, Practice Changes, Experiments | Start Stop Continue Board, Improvement Actions |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | RetrospectiveLearningReflectionTeam | RetrospectiveImprovementExperimentsTeam | RetrospectiveImprovementTeamReflection |