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| Criterion |  Architecture Quality Attribute Workshop |  Operations 5 Whys |  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 single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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 | Low | Medium |
Timedifferent | 2-4 h | 15-30 min | 2-4 h |
Participantsdifferent | 5-15 | 2-6 | 2-6 |
Formatdifferent | Workshop | Workshop | Workshop + async |
Outputdifferent | Quality Scenarios, Priority List, Architecture Concerns | Root cause notes, Countermeasures | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | RequirementsArchitectureWorkshop | Root causeIncidentLeanProblem solving | Root causeSafetyIncident |
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