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| Criterion |  UX Research User Interviews |  Operations Fault Tree Analysis |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|
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. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | Low | High | High |
Timedifferent | 30–60 min per interview | 2-6 h | 2-6 h |
Participantsdifferent | 1 participant per interview | 3-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | QualitativeResearchCustomerDiscovery | RiskRoot causeSafety | RiskQualityOperationsRoot cause |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
