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| Criterion |  Innovation Brainwriting |  Operations 5 Whys |  Operations Root Cause Analysis |
|---|---|---|---|
Purposedifferent | When loud voices or hierarchy distort the idea search, the method creates a quiet entry into joint development. It gives everyone thinking space and gathers contributions without social brakes, making diversity more visible and easier to build on. | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | Low | Low | Medium |
Timedifferent | 15-30 min | 15-30 min | 1-4 h |
Participantsdifferent | 3-12 | 2-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Idea sheets, Expanded concepts, Prioritized list | Root cause notes, Countermeasures | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | BrainstormingCollaborationInclusionIdeas | Root causeIncidentLeanProblem solving | Root causeProblem solvingQualityIncident |
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