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| Criterion |  Agile Affinity Estimation |  Agile Sprint Retrospective |  DevOps Blameless Postmortem |  Agile Bucket System |
|---|---|---|---|---|
Purposedifferent | When many tasks need to be classified quickly, it sorts them by perceived effort and similarity. It reduces the effort of fine-grained estimation for large volumes. | When a sprint is over and friction shouldn't simply be carried forward, it opens the view onto collaboration and patterns. It creates space to see causes and changes 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. | When a large batch of work needs a fast, rough estimate, it sorts items into predefined size buckets. It sorts work by value, risk, and delivery ability. The result is captured as a Bucketed Backlog, Relative Estimates, and Split Candidates. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 30-90 min | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 30-90 min | 30-90 min |
Participantsdifferent | 3-12 | Scrum Team | 3-12 | 3-12 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop |
Outputdifferent | Affinity Size Map, Grouped Estimates, Unclear Items | Improvement actions, Team agreements | Postmortem Doc, Action Items, Timeline | Bucketed Backlog, Relative Estimates, Split Candidates |
Tagsno overlap | EstimationBacklogRelative sizing | RetrospectiveImprovementLearning | Site Reliability EngineeringIncidentLearningReliability | EstimationBacklogRelative sizing |