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| Criterion |  UX Research Empathy Mapping |  UX Research First-click Testing |  Operations 5 Whys |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | When a lot is assumed about a target group but little is seen jointly, empathy mapping makes knowledge and gaps directly comparable. The picture also shows which assumptions hold up and where evidence is missing. | 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 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 an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. |
Complexitydifferent | Low | Low | Low | High |
Timedifferent | 30–60 min | 1-2 Tage | 15-30 min | 1-6 Wochen |
Participantsdifferent | 4-8 | 10-30 | 2-6 | 4-10 |
Formatdifferent | Workshop | Async | Workshop | Workshop + async |
Outputdifferent | Empathy Map, Assumptions List, Research Gaps | Click Heatmap, Success Rate, Design Recommendations | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | SynthesisQualitativeWorkshop | UXNavigationFindabilityValidation | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause |