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| Criterion |  Operations Fault Tree Analysis |  Architecture Architecture Decision Record |  Innovation Design Thinking |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | For complex user problems with an uncertain cause, the method connects observation, interpretation, and experiment into a learning cycle. It keeps the focus on real needs and avoids premature solution language. This produces robust decisions for product and service. | 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. |
Complexitydifferent | High | Low | High | Medium |
Timedifferent | 2-6 h | 15-45 min | 1 Tag bis mehrere Wochen | 2-4 h |
Participantsdifferent | 3-8 | 1-3 | 4-10 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | ADR File, Decision Log, Rationale | Problem Statement, Prototype, Test Learnings | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | RiskRoot causeSafety | ArchitectureRationaleDocumentationGovernance | InnovationPrototypeResearch | Root causeSafetyIncident |