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Selected:SAAM (Software Architecture Analysis Method)Future Reality TreeChange AnalysisCurrent Reality Tree
| Criterion |  Architecture SAAM (Software Architecture Analysis Method) |  Systems Thinking Future Reality Tree |  Operations Change Analysis |  Systems Thinking Current Reality Tree |
|---|---|---|---|---|
Purposedifferent | 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. | A Future Reality Tree shows how desired actions are meant to lead to a better system state. The method checks whether a path of change holds together logically before time flows into implementation. | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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. |
Complexitydifferent | High | High | Medium | High |
Timedifferent | Preparation, scenario analysis, and findings review; effort depends on scope | 2-4 h | 45-120 min | 2-6 h |
Participantsdifferent | Architecture experts and stakeholders for scenarios and weighting | 3-8 | 2-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | 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 | Future Reality Tree, Negative Branches, Assumption List, Improved Injections | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Current Reality Tree, Core Problems, Intervention Ideas |
Tagsno overlap | ArchitectureChangeAnalysisComparisonQuality | Theory of ConstraintsSystems thinkingChange | ChangeRoot causeTroubleshootingComparison | Systems thinkingRoot causeConstraintsCausality |