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| Criterion |  Operations RACI Matrix |  Operations A3 Problem Solving |  Architecture C4 Model |  Architecture Architecture Decision Record |
|---|---|---|---|---|
Purposedifferent | With unclear responsibilities across several roles or areas, the method creates unambiguous accountability logic. It reduces friction because decision, execution, contribution, and information become separately visible. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. | 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 | Low | Medium | Low | Low |
Timedifferent | 45-90 min | 45-90 min | 1-4 h | 15-45 min |
Participantsdifferent | 2-8 | 2-5 | 1-5 | 1-3 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Async |
Outputdifferent | RACI Matrix, Responsibility Map, Decision Notes | A3 Report, Action Plan, Root Cause Analysis | Context Diagram, Container Diagram, Component Diagram | ADR File, Decision Log, Rationale |
Tagsno overlap | RolesResponsibilityGovernanceOperations | LeanProblem solvingCoachingOperations | ArchitectureCommunicationVisualization | ArchitectureRationaleDocumentationGovernance |