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| Criterion |  Operations 8D Problem Solving |  Operations 5 Whys |  Operations Accountability Ladder |  Operations Barrier Analysis |
|---|---|---|---|---|
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 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. | With defensive reactions to problems, the method shifts the view from justification to ownership. It makes visible which reaction stage a person or team is currently stuck on. | 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. |
Complexitydifferent | High | Low | Low | Medium |
Timedifferent | 1-6 Wochen | 15-30 min | 20-45 min | 2-4 h |
Participantsdifferent | 4-10 | 2-6 | 1-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Root cause notes, Countermeasures | Ownership Reflection, Action Commitment, Coaching Notes | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | QualityProblem solvingRoot cause | Root causeIncidentLeanProblem solving | ResponsibilityLeadershipTeam | Root causeSafetyIncident |