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| Criterion |  Operations Barrier Analysis |  Architecture SAAM (Software Architecture Analysis Method) |  Operations Fault Tree Analysis |
|---|---|---|---|
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. | SAAM helps teams judge an architecture’s suitability for selected tasks and changes. It is particularly useful for examining modifiability and comparing architecture alternatives with clear reasoning. | 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. |
Complexitydifferent | Medium | High | High |
Timedifferent | 2-4 h | Preparation, scenario analysis, and findings review; effort depends on scope | 2-6 h |
Participantsdifferent | 2-6 | Architecture experts and stakeholders for scenarios and weighting | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Domain functions mapped to components and connections, Quality attributes and evaluation criteria, Typical tasks and their effects on the architecture, Reasoned evaluation or comparison of alternatives | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | Root causeSafetyIncident | ArchitectureChangeAnalysisComparisonQuality | RiskRoot causeSafety |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
