View methods side by side.
Choose up to four methods. Add them using the search and share the comparison by copying its link.
| Criterion |  Operations 8D Problem Solving |  Operations Barrier Analysis |  Operations 5 Whys |  Operations Root Cause Tree 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 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. | 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. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | High | Medium | Low | Medium |
Timedifferent | 1-6 Wochen | 2-4 h | 15-30 min | 1-3 h |
Participantsdifferent | 4-10 | 2-6 | 2-6 | 2-8 |
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 | Root cause notes, Countermeasures | Cause Tree, Evidence Notes, Countermeasures |
Tags1 shared | QualityProblem solvingRoot cause | Root causeSafetyIncident | Root causeIncidentLeanProblem solving | Root causeTreeIncidentQuality |