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| Criterion |  UX Research First-click Testing |  Systems Thinking Current Reality Tree |  Operations Barrier Analysis |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | 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 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. |
Complexitydifferent | Low | High | Medium | Low |
Timedifferent | 1-2 Tage | 2-6 h | 2-4 h | 15-30 min |
Participantsdifferent | 10-30 | 3-8 | 2-6 | 2-6 |
Formatdifferent | Async | Workshop | Workshop + async | Workshop |
Outputdifferent | Click Heatmap, Success Rate, Design Recommendations | Current Reality Tree, Core Problems, Intervention Ideas | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Root cause notes, Countermeasures |
Tagsno overlap | UXNavigationFindabilityValidation | Systems thinkingRoot causeConstraintsCausality | Root causeSafetyIncident | Root causeIncidentLeanProblem solving |