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Selected:Barrier AnalysisArchitecture Decision RecordLASR (Lightweight Approach for Software Reviews)Fault Tree Analysis
| Criterion |  Operations Barrier Analysis |  Architecture Architecture Decision Record |  Architecture LASR (Lightweight Approach for Software Reviews) |  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. | 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. | LASR helps development teams identify where their software falls short of important quality goals and which improvements to consider. A small group with existing system knowledge can make an initial assessment and investigate open questions in more detail. | 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 | Low | Medium | High |
Timedifferent | 2-4 h | 15-45 min | 3–4 h for initial assessment; preparation and deeper analysis additional | 2-6 h |
Participantsdifferent | 2-6 | 1-3 | 1 or a small team; particularly suitable for 3–4 people | 3-8 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | ADR File, Decision Log, Rationale | Lean Mission Statement describing the software’s purpose, Prioritized quality goals and evaluation criteria, Risks and estimated gaps against quality goals, More closely examined findings and open checks | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions |
Tagsno overlap | Root causeSafetyIncident | ArchitectureRationaleDocumentationGovernance | ArchitectureQualityRiskAssessmentLean | RiskRoot causeSafety |