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| Criterion |  UX Research Tree Testing |  Operations Failure Mode and Effects Analysis |  Operations Fault Tree Analysis |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | When a navigation exists but search paths still fail, tree testing checks findability without visual distraction. The method shows whether labels, levels, and paths really lead to the intended destination. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | 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 | High | Medium |
Timedifferent | 1-2 Tage | 2-6 h | 2-6 h | 2-4 h |
Participantsdifferent | Based on research question | 3-10 | 3-8 | 2-6 |
Formatdifferent | Async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Findability Metrics, Path Analysis, Revised IA | FMEA Table, Risk Priority, Mitigation Actions | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | Information architectureNavigationFindability | RiskQualityOperationsRoot cause | RiskRoot causeSafety | Root causeSafetyIncident |