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| Criterion |  Systems Thinking Current Reality Tree |  Architecture Request for Comments |  Architecture C4 Model |  Architecture arc42 |
|---|---|---|---|---|
Purposedifferent | 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. | An RFC clarifies architecture context, options, and consequences. It structures technical context, alternatives, tradeoffs, open questions, and review feedback, and captures the result as an RFC document, reviewer comments, and a decision rationale. | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. | arc42 structures architecture knowledge so teams can document system, decisions, and risks consistently. The template builds a living understanding of the architecture instead of scattered notes. |
Complexitydifferent | High | Medium | Low | Low |
Timedifferent | 2-6 h | 1-3 Wochen vom Draft bis zur Entscheidung | 1-4 h | 1-2 Tage |
Participantsdifferent | 3-8 | 3-20 Reviewer | 1-5 | 1-4 |
Formatdifferent | Workshop | Async | Workshop + async | Workshop + async |
Outputdifferent | Current Reality Tree, Core Problems, Intervention Ideas | RFC document, Reviewer comments, Decision rationale, Follow-up ADR or tickets | Context Diagram, Container Diagram, Component Diagram | Architecture Document, Context View, Runtime View, Deployment View |
Tagsno overlap | Systems thinkingRoot causeConstraintsCausality | ArchitectureDecisionAsyncGovernance | ArchitectureCommunicationVisualization | ArchitectureDocumentationCommunication |