hard · flats · 2 storeys
B0013: a courtyard on a 17.3 × 28.1 m lot
5 dwellings, 25 rooms. No method found a design meeting every constraint within the budget.
Requirements
- Lot
- 17.3 × 28.1 m (486 m²)
- Street side faces
- 90° (0 = north)
- Setbacks front / rear / left / right
- 5.3 / 7.2 / 2.4 / 1.5 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 42% of the lot
- Parking spaces
- 0
- Courtyard
- 49 m² requested
- Tightness (programme / buildable volume)
- 0.775
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 | 0% | 0.000 | 505 | 1.6 | |
| Random search | 0% | 0.000 | 1500 | 4.7 | |
| Simulated annealing | 0% | 0.000 | 1500 | 4.7 | |
| NSGA-II | 0% | 0.000 | 1500 | 5.1 | |
| CP-SAT | 0% | 0.000 | 0 | 4.6 | solver timeout |
| Random sketch + repair | 0% | 0.000 | 1500 | 5.0 | repair collapse |
| Heuristic-seeded NSGA-II | 0% | 0.000 | 1500 | 5.6 | 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 | C14 |
|---|---|---|---|---|---|---|---|---|---|
| Heuristic | 21% | 57% | 18% | 26% | – | 1% | 1% | 2% | 96% |
| Random search | 100% | 100% | 100% | 100% | 57% | 99% | 99% | 98% | 30% |
| Simulated annealing | 90% | 100% | 97% | 88% | 26% | 90% | 29% | 90% | 38% |
| NSGA-II | 72% | 99% | 100% | 86% | 22% | 78% | 26% | 69% | 75% |
| Random sketch + repair | 89% | 95% | 86% | 61% | 46% | 70% | 84% | 92% | 80% |
| Heuristic-seeded NSGA-II | 34% | 80% | 30% | 29% | 8% | 15% | 16% | 25% | 97% |