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| Criterion |  Operations A3 Problem Solving |  Decision Making Assumption Surfacing |  Operations ALPEN Method |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. | With an overloaded day full of too many tasks, a realistic picture of the day emerges. The method connects estimating, deciding, and buffer thinking so planning fits available energy and time. | 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 | Low | Low | Low |
Timedifferent | 45-90 min | 45-90 min | 10-20 min daily | 15-30 min |
Participantsdifferent | 2-5 | 2-8 | 1 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Assumption List, Critical Assumptions, Learning Plan | Daily Plan, Time Estimates, Review Notes | Root cause notes, Countermeasures |
Tagsno overlap | LeanProblem solvingCoachingOperations | AssumptionsRiskDecisionDiscovery | PlanningTime managementProductivityOperations | Root causeIncidentLeanProblem solving |