medium · flats · 2 storeys
B0042: a adu pair on a 14.8 × 21.3 m lot
2 dwellings, 12 rooms. The pooled front across all methods holds 392 nondominated designs.
Requirements
- Lot
- 14.8 × 21.3 m (315 m²)
- Street side faces
- 285° (0 = north)
- Setbacks front / rear / left / right
- 5.1 / 6.6 / 1.8 / 2.2 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 41% of the lot
- Parking spaces
- 2
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.609
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 3BR | 0 | 84 | entry, living, dining, kitchen, bathroom, bedroom primary, bedroom secondary, bedroom secondary |
| U1 | studio | 1 | 33 | entry, living, kitchen, bathroom |
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 | 0% | 0.000 | 237 | 0.8 | |
| Random search | 0% | 0.000 | 1500 | 4.6 | |
| Simulated annealing | 67% | 0.100 | 1500 | 4.9 | |
| NSGA-II | 67% | 0.091 | 1500 | 6.1 | |
| CP-SAT | 100% | 0.187 | 37 | 6.9 | |
| Random sketch + repair | 67% | 0.090 | 1500 | 4.4 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.181 | 1500 | 6.0 |
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 | 17% | 27% | 5% | 5% | – | 0% | – | 100% |
| Random search | 97% | 100% | 74% | 100% | 14% | 69% | 76% | 84% |
| Simulated annealing | 41% | 81% | 43% | 57% | 7% | 39% | 42% | 62% |
| NSGA-II | 35% | 68% | 39% | 62% | 9% | 30% | 36% | 50% |
| Random sketch + repair | 56% | 95% | 74% | 27% | 7% | 37% | 38% | 49% |
| Heuristic-seeded NSGA-II | 19% | 50% | 27% | 18% | 3% | 21% | 21% | 31% |