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| Criterion |  Operations After-Action Review |  Operations A3 Problem Solving |  Architecture arc42 |  Architecture C4 Model |
|---|---|---|---|---|
Purposedifferent | After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. | 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. | 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. | 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. |
Complexitydifferent | Low | Medium | Low | Low |
Timedifferent | 20-45 min | 45-90 min | 1-2 Tage | 1-4 h |
Participantsdifferent | 3-12 | 2-5 | 1-4 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | A3 Report, Action Plan, Root Cause Analysis | Architecture Document, Context View, Runtime View, Deployment View | Context Diagram, Container Diagram, Component Diagram |
Tagsno overlap | LearningOperationsImprovement | LeanProblem solvingCoachingOperations | ArchitectureDocumentationCommunication | ArchitectureCommunicationVisualization |