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| Criterion |  Operations 8D Problem Solving |  Operations Barrier Analysis |  Innovation Design Charrette |  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 risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | In a tightly timed design process with many participants, the method pools several lines of thinking in a short time. It brings parallel design energy without letting the discussion tip into endless coordination. This quickly produces solid directions for architecture or space. | 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 | Medium | Low |
Timedifferent | 1-6 Wochen | 2-4 h | Halber Tag bis mehrere Tage | 15-30 min |
Participantsdifferent | 4-10 | 2-6 | 10-50 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Sketches and Concepts, Consolidated Solution Sketch, Prioritized Direction | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | Root causeSafetyIncident | BrainstormingWorkshopCollaborationIdeation | Root causeIncidentLeanProblem solving |