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| Criterion |  Operations Barrier Analysis |  Decision Making Assumption Surfacing |  Decision Making Risk Matrix |  Operations 5 Whys |
|---|---|---|---|---|
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. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | When a project faces many possible disruptions, it quickly becomes unclear which risks deserve attention first. It separates options, evaluation criteria, and open risks. The result is captured as a Risk Matrix and a Top Risk List. | 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. |
Complexitydifferent | Medium | Low | Low | Low |
Timedifferent | 2-4 h | 45-90 min | 30-60 min | 15-30 min |
Participantsdifferent | 2-6 | 2-8 | 3-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Assumption List, Critical Assumptions, Learning Plan | Risk Matrix, Top Risk List | Root cause notes, Countermeasures |
Tagsno overlap | Root causeSafetyIncident | AssumptionsRiskDecisionDiscovery | RiskDecisionPrioritizationAssessment | Root causeIncidentLeanProblem solving |