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| Criterion |  UX Research Personas |  Operations Fault Tree Analysis |  Operations 8D Problem Solving |  UX Research Affinity Diagramming |
|---|---|---|---|---|
Purposedifferent | 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 a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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. | 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. |
Complexitydifferent | Medium | High | High | Low |
Timedifferent | 1-3 Tage | 2-6 h | 1-6 Wochen | 45–90 min |
Participantsdifferent | Internes Team | 3-8 | 4-10 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Persona Profiles, Needs Summary, Scenario Notes | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Theme clusters, Insight statements, Opportunity areas |
Tagsno overlap | ResearchCustomerSynthesis | RiskRoot causeSafety | QualityProblem solvingRoot cause | SynthesisQualitativeRoot cause |