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| Criterion |  UX Research Contextual Inquiry |  Operations Barrier Analysis |  Systems Thinking Current Reality Tree |  Operations Causal Factor Analysis |
|---|---|---|---|---|
Purposedifferent | When work processes are known only from accounts and the real context stays hidden, Contextual Inquiry makes behavior at the workplace visible. Observation and follow-up questions together show how people actually work, get interrupted, and improvise. | 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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | 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 | Medium | High | High |
Timedifferent | 1-3 Wochen | 2-4 h | 2-6 h | 2-6 h |
Participantsdifferent | 4-12 Beobachtungen | 2-6 | 3-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Field Notes, Workflow Insights, Pain Points | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Current Reality Tree, Core Problems, Intervention Ideas | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions |
Tagsno overlap | UX researchObservationContext | Root causeSafetyIncident | Systems thinkingRoot causeConstraintsCausality | CausalityIncidentRoot causeTimeline |