medium · flats · 2 storeys
B0026: a duplex on a 13.6 × 18.3 m lot
2 dwellings, 11 rooms. The pooled front across all methods holds 312 nondominated designs.
Requirements
- Lot
- 13.6 × 18.3 m (249 m²)
- Street side faces
- 345° (0 = north)
- Setbacks front / rear / left / right
- 4.6 / 5.4 / 1.5 / 1.8 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 36% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.691
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U1 | 2BR | 1 | 63 | entry, living, kitchen, bathroom, bedroom primary, bedroom secondary |
Required contacts: entry–living, kitchen–living. Doors forbidden between: entry–bedroom_primary, entry–bedroom_secondary, kitchen–bathroom.
Results by method
| Method | Solved | HV | Evals | s | Notes |
|---|---|---|---|---|---|
| Heuristic | 100% | 0.125 | 242 | 0.5 | |
| Random search | 33% | 0.025 | 1500 | 3.1 | |
| Simulated annealing | 100% | 0.107 | 1500 | 3.6 | |
| NSGA-II | 100% | 0.118 | 1500 | 5.0 | |
| CP-SAT | 100% | 0.108 | 48 | 6.8 | |
| Random sketch + repair | 100% | 0.105 | 1500 | 5.3 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.093 | 1500 | 5.3 | repair collapse |
Mean over 1 seeds (the heuristic is deterministic: one run).
Representative designs from the pooled front
Each is best on one objective, or the knee: the most balanced trade-off. None is best overall.
Pareto explorer
Loading designs…
Convergence on this brief
Archive hypervolume against evaluations, mean over seeds.
What stopped designs here
| method | C04 | C05 | C06 | C07 | C08 | C09 | C10 | C11 |
|---|---|---|---|---|---|---|---|---|
| Heuristic | 23% | 60% | 42% | 1% | – | – | 1% | 1% |
| Random search | 85% | 99% | 67% | 98% | 23% | 76% | 36% | 86% |
| Simulated annealing | 40% | 69% | 41% | 51% | 9% | 38% | 16% | 47% |
| NSGA-II | 34% | 68% | 33% | 43% | 7% | 30% | 18% | 31% |
| Random sketch + repair | 39% | 53% | 37% | 10% | 8% | 19% | 32% | 34% |
| Heuristic-seeded NSGA-II | 28% | 62% | 54% | 31% | 8% | 36% | 10% | 23% |