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| Criterion |  Operations 5 Whys |  Operations A3 Problem Solving |  Architecture Software Architecture Canvas |
|---|---|---|---|
Purposedifferent | 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. | 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. |
Complexitydifferent | Low | Medium | Low |
Timedifferent | 15-30 min | 45-90 min | 1-2 h |
Participantsdifferent | 2-6 | 2-5 | 3-10 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Root cause notes, Countermeasures | A3 Report, Action Plan, Root Cause Analysis | Architecture Canvas, Goals, Constraints, Quality Attributes |
Tagsno overlap | Root causeIncidentLeanProblem solving | LeanProblem solvingCoachingOperations | CanvasArchitectureAlignmentWorkshop |
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