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| Criterion |  Operations Barrier Analysis |  UX Research Affinity Diagramming |  Operations Causal Factor Analysis |  Systems Thinking Current Reality Tree |
|---|---|---|---|---|
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 research notes, feedback, or observations sit unconnected side by side, affinity diagramming sorts the raw material into solid themes. Many individual points turn into patterns that make decisions and opportunities clearer. | 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. | 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. |
Complexitydifferent | Medium | Low | High | High |
Timedifferent | 2-4 h | 45–90 min | 2-6 h | 2-6 h |
Participantsdifferent | 2-6 | 3-10 | 3-10 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Theme clusters, Insight statements, Opportunity areas | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Current Reality Tree, Core Problems, Intervention Ideas |
Tags1 shared | Root causeSafetyIncident | SynthesisQualitativeRoot cause | CausalityIncidentRoot causeTimeline | Systems thinkingRoot causeConstraintsCausality |