hard · flats · 2 storeys
B0031: a courtyard on a 16.2 × 25.5 m lot
4 dwellings, 23 rooms. The pooled front across all methods holds 4 nondominated designs.
Requirements
- Lot
- 16.2 × 25.5 m (413 m²)
- Street side faces
- 180° (0 = north)
- Setbacks front / rear / left / right
- 4.8 / 7.1 / 1 / 1.6 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
- 32 m² requested
- Tightness (programme / buildable volume)
- 0.806
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 | 0% | 0.000 | 622 | 2.7 | |
| Random search | 0% | 0.000 | 1500 | 6.6 | |
| Simulated annealing | 0% | 0.000 | 1500 | 6.6 | |
| NSGA-II | 0% | 0.000 | 1500 | 7.3 | |
| CP-SAT | 0% | 0.000 | 0 | 4.6 | solver timeout |
| Random sketch + repair | 0% | 0.000 | 1500 | 6.9 | repair collapse |
| Heuristic-seeded NSGA-II | 33% | 0.011 | 1500 | 7.3 | 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 | C04 | C05 | C06 | C07 | C08 | C09 | C10 | C11 | C14 |
|---|---|---|---|---|---|---|---|---|---|
| Heuristic | 17% | 48% | 8% | 20% | – | 0% | 11% | 1% | 97% |
| Random search | 100% | 100% | 100% | 100% | 63% | 99% | 74% | 99% | 4% |
| Simulated annealing | 88% | 100% | 95% | 93% | 14% | 90% | 58% | 78% | 39% |
| NSGA-II | 66% | 99% | 85% | 83% | 12% | 86% | 47% | 89% | 84% |
| Random sketch + repair | 77% | 100% | 91% | 75% | 13% | 72% | 99% | 76% | 99% |
| Heuristic-seeded NSGA-II | 20% | 57% | 26% | 18% | 6% | 11% | 16% | 24% | 98% |