medium · flats · 2 storeys
B0061: a courtyard on a 21.1 × 25.6 m lot
5 dwellings, 25 rooms. The pooled front across all methods holds 95 nondominated designs.
Requirements
- Lot
- 21.1 × 25.6 m (540 m²)
- Street side faces
- 195° (0 = north)
- Setbacks front / rear / left / right
- 5.5 / 6.1 / 1.4 / 1.1 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 26% of the lot
- Parking spaces
- 0
- Courtyard
- 41 m² requested
- Tightness (programme / buildable volume)
- 0.565
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | studio | 0 | 33 | entry, living, kitchen, bathroom |
| U1 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U2 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U3 | 1BR | 1 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U4 | 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% | 0.050 | 742 | 2.9 | |
| Random search | 0% | 0.000 | 1500 | 5.9 | |
| Simulated annealing | 0% | 0.000 | 1500 | 6.1 | |
| NSGA-II | 0% | 0.000 | 1500 | 7.2 | |
| CP-SAT | 0% | 0.000 | 0 | 2.8 | solver timeout |
| Random sketch + repair | 0% | 0.000 | 1500 | 6.3 | repair collapse |
| Heuristic-seeded NSGA-II | 33% | 0.020 | 1500 | 7.2 | repair collapse |
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 | – | 37% | 65% | 42% | 23% | – | 1% | 11% | 2% | 4% |
| Random search | – | 99% | 100% | 100% | 99% | 37% | 98% | 96% | 98% | 1% |
| Simulated annealing | – | 80% | 97% | 96% | 74% | 18% | 78% | 52% | 73% | 7% |
| NSGA-II | – | 76% | 96% | 88% | 84% | 29% | 59% | 26% | 75% | 11% |
| Random sketch + repair | 29% | 39% | 57% | 54% | 29% | 20% | 36% | 55% | 56% | 69% |
| Heuristic-seeded NSGA-II | – | 44% | 92% | 52% | 29% | 8% | 16% | 20% | 24% | 1% |