easy · flats · 2 storeys
B0056: a duplex on a 13.5 × 23.4 m lot
2 dwellings, 11 rooms. The pooled front across all methods holds 306 nondominated designs.
Requirements
- Lot
- 13.5 × 23.4 m (316 m²)
- Street side faces
- 105° (0 = north)
- Setbacks front / rear / left / right
- 5.7 / 6.9 / 1.9 / 1.3 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 33% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.531
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% | 0.117 | 253 | 0.5 | |
| Random search | 100% | 0.059 | 1500 | 2.7 | |
| Simulated annealing | 100% | 0.146 | 1500 | 3.6 | |
| NSGA-II | 100% | 0.142 | 1500 | 4.9 | |
| CP-SAT | 100% | 0.209 | 50 | 7.2 | |
| Random sketch + repair | 100% | 0.127 | 1500 | 4.1 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.138 | 1500 | 4.9 |
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 | 10% | 36% | 50% | – | – | 2% | 1% | 2% |
| Random search | 38% | 94% | 75% | 45% | 18% | 70% | 38% | 84% |
| Simulated annealing | 23% | 57% | 41% | 15% | 8% | 33% | 19% | 34% |
| NSGA-II | 19% | 52% | 32% | 12% | 8% | 31% | 19% | 27% |
| Random sketch + repair | 30% | 59% | 48% | 10% | 9% | 33% | 26% | 34% |
| Heuristic-seeded NSGA-II | 22% | 50% | 37% | 6% | 4% | 24% | 11% | 19% |