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| Criterion |  Architecture C4 Model |  Operations Fishbone Diagram |  Operations Root Cause Tree Analysis |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | 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. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | Low | Low | Medium | Medium |
Timedifferent | 1-4 h | 30-60 min | 1-3 h | 1-4 h |
Participantsdifferent | 1-5 | 2-8 | 2-8 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Context Diagram, Container Diagram, Component Diagram | Fishbone Diagram, Cause Categories, Investigation Backlog | Cause Tree, Evidence Notes, Countermeasures | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | ArchitectureCommunicationVisualization | Root causeQualityOperations | Root causeTreeIncidentQuality | Root causeProblem solvingQualityIncident |