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| Criterion |  Operations Fishbone Diagram |  UX Research Tree Testing |  UX Research First-click Testing |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | 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. | When users immediately turn the wrong way on a screen or wireframe, first click testing checks initial orientation at high speed. The first click shows early whether expectation, labeling, and wayfinding fit together. | 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. |
Complexitydifferent | Low | Medium | Low | High |
Timedifferent | 30-60 min | 1-2 Tage | 1-2 Tage | 2-6 h |
Participantsdifferent | 2-8 | Based on research question | 10-30 | 3-10 |
Formatdifferent | Workshop | Async | Async | Workshop |
Outputdifferent | Fishbone Diagram, Cause Categories, Investigation Backlog | Findability Metrics, Path Analysis, Revised IA | Click Heatmap, Success Rate, Design Recommendations | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | Root causeQualityOperations | Information architectureNavigationFindability | UXNavigationFindabilityValidation | RiskQualityOperationsRoot cause |