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| Criterion |  Operations Fault Tree Analysis |  Systems Thinking Current Reality Tree |  Architecture LASR (Lightweight Approach for Software Reviews) |
|---|---|---|---|
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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | 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. |
Complexitydifferent | High | High | Medium |
Timedifferent | 2-6 h | 2-6 h | 3–4 h for initial assessment; preparation and deeper analysis additional |
Participantsdifferent | 3-8 | 3-8 | 1 or a small team; particularly suitable for 3–4 people |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Current Reality Tree, Core Problems, Intervention Ideas | 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 |
Tagsno overlap | RiskRoot causeSafety | Systems thinkingRoot causeConstraintsCausality | ArchitectureQualityRiskAssessmentLean |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
