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| Criterion |  Innovation Brainwriting |  Operations Root Cause Analysis |  Innovation Brainstorming |  Operations 5 Whys |
|---|---|---|---|---|
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. | 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. | When a team faces an open question with many obvious directions, the method first creates breadth instead of premature commitment. It separates idea flow from evaluation and makes lines of thought visible, creating a pool for selection and further development. | 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 | Low | Medium | Low | Low |
Timedifferent | 15-30 min | 1-4 h | 30-60 min | 15-30 min |
Participantsdifferent | 3-12 | 3-8 | 4-12 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Idea sheets, Expanded concepts, Prioritized list | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Idea pool, Theme clusters, Shortlist | Root cause notes, Countermeasures |
Tagsno overlap | BrainstormingCollaborationInclusionIdeas | Root causeProblem solvingQualityIncident | BrainstormingIdeationCreativityWorkshopDivergence | Root causeIncidentLeanProblem solving |