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| Criterion |  UX Research Diary Study |  Operations Fault Tree Analysis |  Operations Causal Factor Analysis |  Operations MORT Analysis |
|---|---|---|---|---|
Purposedifferent | When experiences build up over days or weeks and a single session cannot capture them, Diary Study records the course of everyday life. Recurring triggers, moods, and habits become visible this way, beyond the sharpness of memory. | 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 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. | For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. |
Complexitydifferent | Medium | High | High | High |
Timedifferent | 1-4 Wochen | 2-6 h | 2-6 h | Mehrere Tage bis Wochen |
Participantsdifferent | 5-20 | 3-8 | 3-10 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations |
Tagsno overlap | UX researchTrackingBehavior | RiskRoot causeSafety | CausalityIncidentRoot causeTimeline | Root causeSafetySystemicIncident |