medium · flats · 2 storeys
B0024: a adu pair on a 11.7 × 21.2 m lot
2 dwellings, 12 rooms. No method found a design meeting every constraint within the budget.
Requirements
- Lot
- 11.7 × 21.2 m (248 m²)
- Street side faces
- 195° (0 = north)
- Setbacks front / rear / left / right
- 6 / 5 / 1.2 / 1.9 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 28% of the lot
- Parking spaces
- 1
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.719
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 | 556 | 1.0 | |
| Random search | 0% | 0.000 | 1500 | 3.0 | |
| Simulated annealing | 0% | 0.000 | 1500 | 3.9 | |
| NSGA-II | 0% | 0.000 | 1500 | 5.8 | |
| CP-SAT | 0% | 0.000 | 0 | 0.1 | solver infeasible |
| Random sketch + repair | 0% | 0.000 | 1500 | 4.7 | repair collapse |
| Heuristic-seeded NSGA-II | 0% | 0.000 | 1500 | 4.6 | repair collapse |
Mean over 1 seeds (the heuristic is deterministic: one run).
Closest attempts that failed
For methods that found nothing feasible: their least-infeasible design, with its violations marked on its page.
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 | 18% | 64% | 7% | 100% | – | – | 2% | 100% |
| Random search | 100% | 100% | 74% | 100% | 16% | 74% | 76% | 84% |
| Simulated annealing | 83% | 94% | 50% | 100% | 10% | 41% | 52% | 37% |
| NSGA-II | 68% | 91% | 33% | 100% | 9% | 29% | 38% | 52% |
| Random sketch + repair | 59% | 91% | 60% | 100% | 8% | 36% | 56% | 48% |
| Heuristic-seeded NSGA-II | 41% | 73% | 25% | 100% | 3% | 24% | 28% | 24% |