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| Criterion |  Operations 5 Whys |  Operations 8D Problem Solving |  Architecture Architecture Communication 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 an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | The Architecture Communication Canvas plans architecture communication so the right people receive the right message. The method turns technical complexity into deliberate communication design. |
Complexitydifferent | Low | High | Medium |
Timedifferent | 15-30 min | 1-6 Wochen | 60-120 min |
Participantsdifferent | 2-6 | 4-10 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Communication Canvas, Stakeholder Messages, Architecture Communication Plan |
Tagsno overlap | Root causeIncidentLeanProblem solving | QualityProblem solvingRoot cause | ArchitectureCommunicationStakeholdersCanvas |
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