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| Criterion | ![]() UX Research Usability Testing | ![]() Operations Barrier Analysis | ![]() Operations MORT Analysis | ![]() Operations Family Tree Analysis |
|---|---|---|---|---|
Purposedifferent | When a product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | 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. | For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. |
Complexitydifferent | Medium | Medium | High | Medium |
Timedifferent | 1-2 h je Session | 2-4 h | Mehrere Tage bis Wochen | 2-4 h |
Participantsdifferent | Based on research question | 2-6 | 2-6 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Usability Issues, Severity List, Recommendations | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | ValidationUXPrototype | Root causeSafetyIncident | Root causeSafetySystemicIncident | Root causePatternsIncidentSystemic |



