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 Failure Mode and Effects Analysis |  Decision Making Pre-Mortem |  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 process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures. | 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 | High | Low | Low |
Timedifferent | 1-6 Wochen | 2-6 h | 20–45 min | 15-30 min |
Participantsdifferent | 4-10 | 3-10 | Small cross-functional group | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | FMEA Table, Risk Priority, Mitigation Actions | Risk list, Mitigation plan, Assumption log | Root cause notes, Countermeasures |
Tagsno overlap | QualityProblem solvingRoot cause | RiskQualityOperationsRoot cause | RiskDecisionFailurePlanning | Root causeIncidentLeanProblem solving |