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| Criterion |  Operations Standard Work Analysis |  Operations 8D Problem Solving |  Facilitation Nominal Group Technique |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | When the same task is done differently depending on the person, the method exposes the reliable core. It creates comparability without unnecessarily choking off needed latitude. | 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. | When loud voices could dominate a round, Nominal Group Technique protects individual thinking time from group effects. It collects ideas separately first and only then enables shared weighting. | 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 | Medium | High | Medium | Low |
Timedifferent | 1-3 h | 1-6 Wochen | 60-120 min | 15-30 min |
Participantsdifferent | 2-6 | 4-10 | 5-12 | 2-6 |
Formatdifferent | Workshop | Workshop + async | Workshop | Workshop |
Outputdifferent | Standard Work Sheet, Deviation List, Improved Standard, Training Needs | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Ranked Ideas, Clarified Options, Group Priority | Root cause notes, Countermeasures |
Tagsno overlap | LeanProcessQuality | QualityProblem solvingRoot cause | FacilitationPrioritizationVotingInclusion | Root causeIncidentLeanProblem solving |