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| Criterion |  UX Research User Interviews |  Operations Fault Tree Analysis |  UX Research Empathy Mapping |
|---|---|---|---|
Purposedifferent | 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 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 a lot is assumed about a target group but little is seen jointly, empathy mapping makes knowledge and gaps directly comparable. The picture also shows which assumptions hold up and where evidence is missing. |
Complexitydifferent | Low | High | Low |
Timedifferent | 30–60 min per interview | 2-6 h | 30–60 min |
Participantsdifferent | 1 participant per interview | 3-8 | 4-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Empathy Map, Assumptions List, Research Gaps |
Tagsno overlap | QualitativeResearchCustomerDiscovery | RiskRoot causeSafety | SynthesisQualitativeWorkshop |
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