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| Criterion |  Operations Barrier Analysis |  UX Research User Interviews |  UX Research Personas |  Operations Causal Factor Analysis |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | 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 an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | 2-4 h | 30–60 min per interview | 1-3 Tage | 2-6 h |
Participantsdifferent | 2-6 | 1 participant per interview | Internes Team | 3-10 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Interview Notes, Themes, Insight Summary | Persona Profiles, Needs Summary, Scenario Notes | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions |
Tagsno overlap | Root causeSafetyIncident | QualitativeResearchCustomerDiscovery | ResearchCustomerSynthesis | CausalityIncidentRoot causeTimeline |