easy · flats · 2 storeys
B0019: a courtyard on a 21.7 × 27.8 m lot
4 dwellings, 22 rooms. The pooled front across all methods holds 543 nondominated designs.
Requirements
- Lot
- 21.7 × 27.8 m (603 m²)
- Street side faces
- 15° (0 = north)
- Setbacks front / rear / left / right
- 5.5 / 5.8 / 1.6 / 2.2 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 30% of the lot
- Parking spaces
- 0
- Courtyard
- 36 m² requested
- Tightness (programme / buildable volume)
- 0.444
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U1 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U2 | 2BR | 1 | 63 | entry, living, kitchen, bathroom, bedroom primary, bedroom secondary |
| U3 | 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% | 0.161 | 501 | 2.9 | |
| Random search | 0% | 0.000 | 1500 | 7.1 | |
| Simulated annealing | 0% | 0.000 | 1500 | 6.2 | |
| NSGA-II | 67% | 0.062 | 1500 | 7.2 | |
| CP-SAT | 0% | 0.000 | 0 | 4.6 | solver timeout |
| Random sketch + repair | 100% | 0.129 | 1500 | 6.6 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.189 | 1500 | 9.3 |
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 | C14 |
|---|---|---|---|---|---|---|---|---|---|
| Heuristic | 15% | 32% | 22% | – | – | 2% | – | 3% | 3% |
| Random search | 94% | 100% | 100% | 98% | 40% | 97% | 54% | 98% | 0% |
| Simulated annealing | 59% | 85% | 92% | 52% | 7% | 89% | 13% | 54% | 1% |
| NSGA-II | 30% | 62% | 64% | 24% | 6% | 62% | 12% | 41% | 3% |
| Random sketch + repair | 34% | 53% | 52% | 8% | 10% | 41% | 21% | 54% | 24% |
| Heuristic-seeded NSGA-II | 10% | 31% | 33% | 2% | 5% | 11% | 11% | 27% | 4% |