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| Criterion |  Architecture Architecture Decision Record |  Operations Barrier Analysis |
|---|---|---|
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. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. |
Complexitydifferent | Low | Medium |
Timedifferent | 15-45 min | 2-4 h |
Participantsdifferent | 1-3 | 2-6 |
Formatdifferent | Async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | Root causeSafetyIncident |
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