hard · flats · 2 storeys
B0032: a duplex on a 13.9 × 23 m lot
2 dwellings, 12 rooms. The pooled front across all methods holds 277 nondominated designs.
Requirements
- Lot
- 13.9 × 23 m (320 m²)
- Street side faces
- 90° (0 = north)
- Setbacks front / rear / left / right
- 6.5 / 7.8 / 1.1 / 2.3 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 27% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.740
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 2BR | 0 | 63 | entry, living, kitchen, bathroom, bedroom primary, bedroom secondary |
| 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% | 0.165 | 234 | 0.7 | |
| Random search | 0% | 0.000 | 1500 | 3.6 | |
| Simulated annealing | 100% | 0.123 | 1500 | 3.9 | |
| NSGA-II | 100% | 0.128 | 1500 | 4.9 | |
| CP-SAT | 100% | 0.156 | 45 | 6.8 | |
| Random sketch + repair | 67% | 0.053 | 1500 | 4.3 | repair collapse |
| Heuristic-seeded NSGA-II | 0% | 0.000 | 1500 | 4.1 | 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.
Closest attempts that failed
For methods that found nothing feasible: their least-infeasible design, with its violations marked on its page.
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 | 9% | 32% | 29% | – | – | 0% | 3% | 0% |
| Random search | 83% | 99% | 69% | 90% | 27% | 78% | 52% | 87% |
| Simulated annealing | 35% | 71% | 42% | 24% | 9% | 45% | 19% | 45% |
| NSGA-II | 33% | 65% | 31% | 21% | 10% | 33% | 29% | 35% |
| Random sketch + repair | 59% | 81% | 67% | 11% | 7% | 36% | 60% | 77% |
| Heuristic-seeded NSGA-II | 33% | 73% | 93% | 15% | 5% | 23% | 17% | 19% |