medium · flats · 2 storeys
B0043: a courtyard on a 19.9 × 25.6 m lot
4 dwellings, 23 rooms. The pooled front across all methods holds 360 nondominated designs.
Requirements
- Lot
- 19.9 × 25.6 m (509 m²)
- Street side faces
- 30° (0 = north)
- Setbacks front / rear / left / right
- 3.4 / 7.7 / 2.3 / 1.5 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 32% of the lot
- Parking spaces
- 0
- Courtyard
- 49 m² requested
- Tightness (programme / buildable volume)
- 0.670
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U1 | 2BR | 0 | 63 | entry, living, kitchen, bathroom, bedroom primary, bedroom secondary |
| 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% | 0.111 | 679 | 3.9 | |
| Random search | 0% | 0.000 | 1500 | 6.5 | |
| Simulated annealing | 0% | 0.000 | 1500 | 6.6 | |
| NSGA-II | 67% | 0.027 | 1500 | 7.4 | |
| CP-SAT | 0% | 0.000 | 0 | 4.6 | solver timeout |
| Random sketch + repair | 0% | 0.000 | 1500 | 6.1 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.115 | 1500 | 9.4 |
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.
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 | C01 | C04 | C05 | C06 | C07 | C08 | C09 | C10 | C11 | C14 |
|---|---|---|---|---|---|---|---|---|---|---|
| Heuristic | – | 22% | 37% | 6% | 1% | – | – | 12% | 0% | 4% |
| Random search | – | 100% | 100% | 100% | 100% | 51% | 98% | 62% | 98% | 15% |
| Simulated annealing | – | 80% | 97% | 97% | 68% | 14% | 84% | 29% | 78% | 12% |
| NSGA-II | – | 51% | 89% | 67% | 51% | 12% | 71% | 16% | 61% | 45% |
| Random sketch + repair | 31% | 28% | 68% | 52% | 11% | 9% | 31% | 40% | 45% | 65% |
| Heuristic-seeded NSGA-II | – | 20% | 45% | 29% | 3% | 5% | 10% | 14% | 25% | 5% |