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5.6Measuring Three Amigos Effectiveness
| Metric | Without Three Amigos | With Three Amigos |
|---|---|---|
| Acceptance criteria changes during sprint | 40% of stories | < 10% of stories |
| Bugs from undefined behavior | Frequent | Rare |
| Stories sent back to PO for clarification | 20% of stories | < 5% of stories |
| Test cases written before dev starts | 0% | 80% |
| Sprint planning time | Shorter (but issues emerge later) | Slightly longer (but fewer surprises) |