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| Criterion |  UX Research Affinity Diagramming |  Operations Root Cause Tree Analysis |  UX Research Personas |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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 a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | When target groups stay too vague and teams talk about the same people differently, personas create a shared, solid picture of usage. Condensed profiles make needs, contexts, and differences tangible enough for decisions. | 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 | Medium | Medium | High |
Timedifferent | 45–90 min | 1-3 h | 1-3 Tage | 1-6 Wochen |
Participantsdifferent | 3-10 | 2-8 | Internes Team | 4-10 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Theme clusters, Insight statements, Opportunity areas | Cause Tree, Evidence Notes, Countermeasures | Persona Profiles, Needs Summary, Scenario Notes | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | SynthesisQualitativeRoot cause | Root causeTreeIncidentQuality | ResearchCustomerSynthesis | QualityProblem solvingRoot cause |