easy · flats · 2 storeys
B0055: a courtyard on a 21.7 × 26.3 m lot
4 dwellings, 23 rooms. The pooled front across all methods holds 480 nondominated designs.
Requirements
- Lot
- 21.7 × 26.3 m (571 m²)
- Street side faces
- 15° (0 = north)
- Setbacks front / rear / left / right
- 4.1 / 6.9 / 2.1 / 1.9 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 34% of the lot
- Parking spaces
- 0
- Courtyard
- 39 m² requested
- Tightness (programme / buildable volume)
- 0.535
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% | 0.148 | 514 | 6.6 | |
| Random search | 0% | 0.000 | 1500 | 10.0 | |
| Simulated annealing | 67% | 0.052 | 1500 | 7.7 | |
| NSGA-II | 33% | 0.011 | 1500 | 6.3 | |
| CP-SAT | 0% | 0.000 | 0 | 4.6 | solver timeout |
| Random sketch + repair | 33% | 0.055 | 1500 | 5.9 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.175 | 1500 | 8.5 |
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 | 5% | 31% | 15% | – | – | 1% | 0% | 3% | 3% |
| Random search | 98% | 100% | 100% | 100% | 47% | 97% | 60% | 98% | 0% |
| Simulated annealing | 56% | 92% | 79% | 56% | 14% | 87% | 16% | 63% | 8% |
| NSGA-II | 46% | 70% | 75% | 29% | 6% | 90% | 13% | 59% | 1% |
| Random sketch + repair | 32% | 57% | 72% | 24% | 18% | 46% | 28% | 56% | 50% |
| Heuristic-seeded NSGA-II | 12% | 37% | 31% | 3% | 5% | 11% | 9% | 28% | 4% |