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| Criterion |  Product Discovery Product Kata |  Operations A3 Problem Solving |  Architecture arc42 |  Operations After-Action Review |
|---|---|---|---|---|
Purposedifferent | Product Kata helps clarify customer problems, solution ideas, and evidence through a repeatable improvement routine. It captures direction, current metric, target metric, experiment notes, and learning. | 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. | 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. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 1-2 Wochen je Loop | 45-90 min | 1-2 Tage | 20-45 min |
Participantsdifferent | 3-10 | 2-5 | 1-4 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Direction, Current metric, Target metric, Experiment note, Learning report | A3 Report, Action Plan, Root Cause Analysis | Architecture Document, Context View, Runtime View, Deployment View | Lessons learned, Action items, Event summary |
Tagsno overlap | OutcomesDiscoveryLearningIterationCoaching | LeanProblem solvingCoachingOperations | ArchitectureDocumentationCommunication | LearningOperationsImprovement |