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| Criterion |  Operations 5 Whys |  Decision Making Assumption Surfacing |  Operations Root Cause Tree Analysis |
|---|---|---|---|
Purposedifferent | 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. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | 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 | Low | Low | Medium |
Timedifferent | 15-30 min | 45-90 min | 1-3 h |
Participantsdifferent | 2-6 | 2-8 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop |
Outputdifferent | Root cause notes, Countermeasures | Assumption List, Critical Assumptions, Learning Plan | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | Root causeIncidentLeanProblem solving | AssumptionsRiskDecisionDiscovery | Root causeTreeIncidentQuality |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
