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| Criterion |  Architecture Quality Attribute Workshop |  Operations Fault Tree Analysis |  Operations Barrier Analysis |
|---|---|---|---|
Purposedifferent | A Quality Attribute Workshop translates quality requirements into concrete scenarios and architecture impulses. The method brings product, engineering, and operations to the same view of desired properties. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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 | Medium | High | Medium |
Timedifferent | 2-4 h | 2-6 h | 2-4 h |
Participantsdifferent | 5-15 | 3-8 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Quality Scenarios, Priority List, Architecture Concerns | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | RequirementsArchitectureWorkshop | RiskRoot causeSafety | Root causeSafetyIncident |
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