easy · flats · 2 storeys
B0002: a duplex on a 15.3 × 19.8 m lot
2 dwellings, 10 rooms. The pooled front across all methods holds 621 nondominated designs.
Requirements
- Lot
- 15.3 × 19.8 m (303 m²)
- Street side faces
- 150° (0 = north)
- Setbacks front / rear / left / right
- 4 / 6.5 / 1.2 / 1.7 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 39% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.439
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U1 | 1BR | 1 | 46 | entry, living, kitchen, bathroom, bedroom primary |
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% | 0.161 | 141 | 0.5 | |
| Random search | 100% | 0.115 | 1500 | 3.4 | |
| Simulated annealing | 100% | 0.143 | 1500 | 3.2 | |
| NSGA-II | 100% | 0.182 | 1500 | 4.9 | |
| CP-SAT | 100% | 0.147 | 49 | 6.7 | |
| Random sketch + repair | 100% | 0.177 | 1500 | 3.8 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.045 | 1500 | 3.5 |
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 | 5% | 39% | 48% | – | – | 1% | 7% | 1% |
| Random search | 26% | 87% | 67% | 2% | 11% | 69% | 22% | 81% |
| Simulated annealing | 24% | 60% | 41% | 7% | 7% | 45% | 16% | 37% |
| NSGA-II | 18% | 49% | 34% | 6% | 7% | 29% | 11% | 25% |
| Random sketch + repair | 25% | 50% | 39% | 5% | 8% | 27% | 27% | 36% |
| Heuristic-seeded NSGA-II | 28% | 62% | 49% | 5% | 4% | 25% | 14% | 22% |