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| Criterion |  DevOps Blameless Postmortem |  Decision Making Constraint Analysis |  Systems Thinking Current Reality Tree |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | When an initiative stalls, the limit often lies not in the idea but in hard or soft boundary conditions. Constraint Analysis separates these limits and shows which of them can actually be shaped. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | 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 | High | Low |
Timedifferent | 30-90 min | 30-90 min | 2-6 h | 15-30 min |
Participantsdifferent | 3-12 | 2-8 | 3-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Constraint List, Hard/Soft Classification, Option Impact Notes, Decision Boundaries | Current Reality Tree, Core Problems, Intervention Ideas | Root cause notes, Countermeasures |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | ConstraintsDecisionPlanningOptions | Systems thinkingRoot causeConstraintsCausality | Root causeIncidentLeanProblem solving |