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| Criterion |  Operations Fault Tree Analysis |  UX Research Personas |  UX Research User Interviews |
|---|---|---|---|
Purposedifferent | 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. | 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. | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. |
Complexitydifferent | High | Medium | Low |
Timedifferent | 2-6 h | 1-3 Tage | 30–60 min per interview |
Participantsdifferent | 3-8 | Internes Team | 1 participant per interview |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Persona Profiles, Needs Summary, Scenario Notes | Interview Notes, Themes, Insight Summary |
Tagsno overlap | RiskRoot causeSafety | ResearchCustomerSynthesis | QualitativeResearchCustomerDiscovery |
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