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| Criterion |  Agile Bucket System |  Agile Affinity Estimation |  Systems Thinking Iceberg Model |  Systems Thinking Current Reality Tree |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | The Iceberg Model separates visible events from patterns, structures, and mental models. This turns a single observation into a deeper understanding of why a problem keeps recurring. | 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. |
Complexitydifferent | Medium | Medium | Low | High |
Timedifferent | 30-90 min | 30-90 min | 30-60 min | 2-6 h |
Participantsdifferent | 3-12 | 3-12 | 2-10 | 3-8 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop |
Outputdifferent | Bucketed Backlog, Relative Estimates, Split Candidates | Affinity Size Map, Grouped Estimates, Unclear Items | Iceberg Worksheet, Pattern Notes, Intervention Ideas | Current Reality Tree, Core Problems, Intervention Ideas |
Tagsno overlap | EstimationBacklogRelative sizing | EstimationBacklogRelative sizing | Systems thinkingRoot causePatterns | Systems thinkingRoot causeConstraintsCausality |