hard · flats · 2 storeys
B0068: a duplex on a 16.9 × 19.4 m lot
2 dwellings, 10 rooms. The pooled front across all methods holds 579 nondominated designs.
Requirements
- Lot
- 16.9 × 19.4 m (328 m²)
- Street side faces
- 300° (0 = north)
- Setbacks front / rear / left / right
- 4.6 / 4.9 / 1.2 / 2.5 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 38% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.387
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% | 0.175 | 200 | 0.5 | |
| Random search | 100% | 0.135 | 1500 | 3.1 | |
| Simulated annealing | 100% | 0.215 | 1500 | 4.4 | |
| NSGA-II | 100% | 0.203 | 1500 | 5.8 | |
| CP-SAT | 100% | 0.229 | 49 | 6.8 | |
| Random sketch + repair | 100% | 0.201 | 1500 | 4.4 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.050 | 1500 | 4.4 |
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 | 1% | 25% | 41% | – | – | – | 5% | – |
| Random search | 14% | 80% | 67% | 0% | 9% | 69% | 20% | 82% |
| Simulated annealing | 20% | 47% | 35% | 6% | 4% | 28% | 13% | 33% |
| NSGA-II | 14% | 44% | 36% | 6% | 6% | 29% | 10% | 27% |
| Random sketch + repair | 19% | 44% | 48% | 3% | 14% | 38% | 21% | 34% |
| Heuristic-seeded NSGA-II | 20% | 55% | 48% | 5% | 3% | 22% | 16% | 20% |