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| Criterion |  Knowledge Modeling IBIS |  Architecture arc42 |  Operations 5 Whys |  Architecture Architecture Decision Record |
|---|---|---|---|---|
Purposedifferent | IBIS structures thinking about complex questions as a sequence of issues, ideas, and arguments. The method keeps discussions open without forcing them into premature consensus. | 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. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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. |
Complexitydifferent | Medium | Low | Low | Low |
Timedifferent | 1-3 h | 1-2 Tage | 15-30 min | 15-45 min |
Participantsdifferent | 2-8 | 1-4 | 2-6 | 1-3 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Async |
Outputdifferent | Issue Map, Positions, Argument Notes | Architecture Document, Context View, Runtime View, Deployment View | Root cause notes, Countermeasures | ADR File, Decision Log, Rationale |
Tagsno overlap | RationaleKnowledgeDecision | ArchitectureDocumentationCommunication | Root causeIncidentLeanProblem solving | ArchitectureRationaleDocumentationGovernance |