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| Criterion |  Operations Barrier Analysis |  Operations 5 Whys |  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. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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 |
Timedifferent | 2-4 h | 15-30 min | 2-6 h |
Participantsdifferent | 2-6 | 2-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Root cause notes, Countermeasures | Current Reality Tree, Core Problems, Intervention Ideas |
Tags1 shared | Root causeSafetyIncident | Root causeIncidentLeanProblem solving | Systems thinkingRoot causeConstraintsCausality |
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