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| Criterion |  Operations A3 Problem Solving |  Architecture Software Architecture Canvas |  Operations Kaizen Event |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | The Software Architecture Canvas reduces a system to the most important architecture decisions, constraints, and interfaces. It is useful when teams need a resilient overall picture quickly. | For a tightly scoped process segment with noticeable waste, the method bundles shared energy for change. It suits situations that call for fast learning loops and visible adjustments. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 45-90 min | 1-2 h | 0.5-5 Tage | 15-30 min |
Participantsdifferent | 2-5 | 3-10 | 4-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Architecture Canvas, Goals, Constraints, Quality Attributes | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Root cause notes, Countermeasures |
Tagsno overlap | LeanProblem solvingCoachingOperations | CanvasArchitectureAlignmentWorkshop | LeanContinuous improvementOperations | Root causeIncidentLeanProblem solving |