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| Criterion |  Operations 8D Problem Solving |  Operations Family Tree Analysis |  Innovation Brainstorming |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. | 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 | High | Medium | Low | Low |
Timedifferent | 1-6 Wochen | 2-4 h | 30-60 min | 15-30 min |
Participantsdifferent | 4-10 | 2-6 | 4-12 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Family Tree Diagram, Pattern Notes, Systemic Measures | Idea pool, Theme clusters, Shortlist | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | Root causePatternsIncidentSystemic | BrainstormingIdeationCreativityWorkshopDivergence | Root causeIncidentLeanProblem solving |