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| Criterion |  Operations After-Action Review |  Architecture arc42 |  Architecture LASR (Lightweight Approach for Software Reviews) |  Operations A3 Problem Solving |
|---|---|---|---|---|
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. | 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. | LASR helps development teams identify where their software falls short of important quality goals and which improvements to consider. A small group with existing system knowledge can make an initial assessment and investigate open questions in more detail. | 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. |
Complexitydifferent | Low | Low | Medium | Medium |
Timedifferent | 20-45 min | 1-2 Tage | 3–4 h for initial assessment; preparation and deeper analysis additional | 45-90 min |
Participantsdifferent | 3-12 | 1-4 | 1 or a small team; particularly suitable for 3–4 people | 2-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | Architecture Document, Context View, Runtime View, Deployment View | Lean Mission Statement describing the software’s purpose, Prioritized quality goals and evaluation criteria, Risks and estimated gaps against quality goals, More closely examined findings and open checks | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | LearningOperationsImprovement | ArchitectureDocumentationCommunication | ArchitectureQualityRiskAssessmentLean | LeanProblem solvingCoachingOperations |