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| Criterion |  UX Research Diary Study |  Operations Causal Factor Analysis |  UX Research Empathy Mapping |  Operations Barrier 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 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. | 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. | 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 | 1-4 Wochen | 2-6 h | 30–60 min | 2-4 h |
Participantsdifferent | 5-20 | 3-10 | 4-8 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Empathy Map, Assumptions List, Research Gaps | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | UX researchTrackingBehavior | CausalityIncidentRoot causeTimeline | SynthesisQualitativeWorkshop | Root causeSafetyIncident |