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| Criterion |  Operations Kepner-Tregoe |  Operations 5 Whys |  Operations ALPEN Method |  Operations Barrier Analysis |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | 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 risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. |
Complexitydifferent | High | Low | Low | Medium |
Timedifferent | 2-8 h | 15-30 min | 10-20 min daily | 2-4 h |
Participantsdifferent | 2-8 | 2-6 | 1 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Async | Workshop + async |
Outputdifferent | Problem Analysis, Decision Analysis, Risk Plan | Root cause notes, Countermeasures | Daily Plan, Time Estimates, Review Notes | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | Problem solvingRoot causeDecisionOperations | Root causeIncidentLeanProblem solving | PlanningTime managementProductivityOperations | Root causeSafetyIncident |