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| Criterion |  Operations Gemba Walk |  Product Strategy DIBB |  Operations Kepner-Tregoe |  Decision Making Assumption Surfacing |
|---|---|---|---|---|
Purposedifferent | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | DIBB helps clarify target groups, value, goals, and priorities by making the logic behind a decision explicit. It captures results as a DIBB document, belief list, bet list, and learning report. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | 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. |
Complexitydifferent | Low | Low | High | Low |
Timedifferent | 30-120 min | 1-2 h | 2-8 h | 45-90 min |
Participantsdifferent | 2-6 | 2-8 | 2-8 | 2-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Observation Notes, Improvement Ideas | DIBB document, Belief list, Bet list, Learning report | Problem Analysis, Decision Analysis, Risk Plan | Assumption List, Critical Assumptions, Learning Plan |
Tagsno overlap | LeanObservationProcessOperations | StrategyDecisionAssumptionsHypothesis | Problem solvingRoot causeDecisionOperations | AssumptionsRiskDecisionDiscovery |