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| Criterion |  UX Research Usability Testing |  UX Research Affinity Diagramming |  Operations 8D Problem Solving |
|---|---|---|---|
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. | When research notes, feedback, or observations sit unconnected side by side, affinity diagramming sorts the raw material into solid themes. Many individual points turn into patterns that make decisions and opportunities clearer. | 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 | Medium | Low | High |
Timedifferent | 1-2 h je Session | 45–90 min | 1-6 Wochen |
Participantsdifferent | Based on research question | 3-10 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Usability Issues, Severity List, Recommendations | Theme clusters, Insight statements, Opportunity areas | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | ValidationUXPrototype | SynthesisQualitativeRoot cause | QualityProblem solvingRoot cause |
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