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| Criterion |  UX Research Personas |  Operations Fault Tree Analysis |  UX Research User Interviews |  Operations Barrier Analysis |
|---|---|---|---|---|
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. | 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. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. |
Complexitydifferent | Medium | High | Low | Medium |
Timedifferent | 1-3 Tage | 2-6 h | 30–60 min per interview | 2-4 h |
Participantsdifferent | Internes Team | 3-8 | 1 participant per interview | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Persona Profiles, Needs Summary, Scenario Notes | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Interview Notes, Themes, Insight Summary | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | ResearchCustomerSynthesis | RiskRoot causeSafety | QualitativeResearchCustomerDiscovery | Root causeSafetyIncident |