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| Criterion |  Engineering Fault Isolation |  Operations Barrier Analysis |  Business Strategy VRIO Framework |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | 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. | The VRIO Framework rates resources and capabilities on whether they are Valuable, Rare, Inimitable, and Organized. It compares strengths, risks, market logic, and courses of action. The result is captured as a VRIO table and strategic actions. | 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 | Medium | Medium | Low |
Timedifferent | 30-180 min | 2-4 h | 90-180 min | 15-30 min |
Participantsdifferent | 1-6 | 2-6 | 3-6 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | VRIO Table, Strategic Actions | Root cause notes, Countermeasures |
Tagsno overlap | TroubleshootingDiagnosisEngineering | Root causeSafetyIncident | StrategyDiagnosisBusiness modelCapability | Root causeIncidentLeanProblem solving |