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| Criterion |  Operations 5 Whys |  Operations Change Analysis |  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 deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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 | 45-120 min | 1-2 h |
Participantsdifferent | 2-6 | 2-6 | 3-10 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Root cause notes, Countermeasures | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Architecture Canvas, Goals, Constraints, Quality Attributes |
Tagsno overlap | Root causeIncidentLeanProblem solving | ChangeRoot causeTroubleshootingComparison | CanvasArchitectureAlignmentWorkshop |
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