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| Criterion |  Agile Sprint Retrospective |  Architecture C4 Model |  Operations After-Action Review |  Operations Learning Review |
|---|---|---|---|---|
Purposedifferent | When a sprint is over and friction shouldn't simply be carried forward, it opens the view onto collaboration and patterns. It creates space to see causes and changes 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. | 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. | After a project phase with mixed results, the method makes learning from the individual case reusable. It connects events, decisions, and systemic conditions into robust insights. |
Complexitydifferent | Low | Low | Low | Medium |
Timedifferent | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 1-4 h | 20-45 min | 1-3 h |
Participantsdifferent | Scrum Team | 1-5 | 3-12 | 3-10 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Improvement actions, Team agreements | Context Diagram, Container Diagram, Component Diagram | Lessons learned, Action items, Event summary | Learning Review Notes, System Factors, Improvement Actions |
Tagsno overlap | RetrospectiveImprovementLearning | ArchitectureCommunicationVisualization | LearningOperationsImprovement | LearningRetrospectiveIncidentOperations |