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| Criterion |  Decision Making Delphi Method |  Operations A3 Problem Solving |  DevOps Blameless Postmortem |  Operations Learning Review |
|---|---|---|---|---|
Purposedifferent | When knowledge is distributed and direct dominance should be avoided, groups quickly fall under the sway of their opinion leaders. The Delphi Method gathers assessments iteratively and gradually brings expert judgments closer together. | 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. | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | After a project phase with mixed results, the method makes learning from the individual case reusable. It connects events, decisions, and systemic conditions into robust insights. |
Complexitydifferent | High | Medium | Medium | Medium |
Timedifferent | 1-4 Wochen | 45-90 min | 30-90 min | 1-3 h |
Participantsdifferent | 6-30 Experten | 2-5 | 3-12 | 3-10 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | A3 Report, Action Plan, Root Cause Analysis | Postmortem Doc, Action Items, Timeline | Learning Review Notes, System Factors, Improvement Actions |
Tagsno overlap | ForecastingExpertsDecisionStrategy | LeanProblem solvingCoachingOperations | Site Reliability EngineeringIncidentLearningReliability | LearningRetrospectiveIncidentOperations |