Example individual solutions with varying numbers of birth centres
| Optimisation parameter | No of birth centres | |||||
| 50 | 70 | 85 | 100 | 125 | 150 | |
| Mean travel time (min) | 23 | 21 | 19 | 17 | 15 | 14 |
| 95th percentile travel time (min) | 49 | 45 | 41 | 35 | 31 | 30 |
| Maximum travel time (min) | 142 | 99 | 99 | 89 | 82 | 82 |
| Mothers within 30 min | 77% | 82% | 86% | 90% | 94% | 95% |
| Minimum admissions | 7369 | 3793 | 2700 | 1300 | 1094 | 1094 |
| Maximum admissions | 26 087 | 14 584 | 11 382 | 10 670 | 9406 | 8548 |
| Number of birth centres with 6000 admissions | 50 | 60 | 61 | 57 | 42 | 28 |
| Mothers attending birth centre with 6000 admissions | 100% | 93% | 84% | 75% | 52% | 32% |
| Mothers attending birth centre with 6000 admissions within 30 min | 77% | 77% | 74% | 70% | 51% | 32% |