easy · maisonette · 2 storeys
B0040: a rowhouse on a 20.7 × 22.5 m lot
3 dwellings, 29 rooms. The pooled front across all methods holds 120 nondominated designs.
Requirements
- Lot
- 20.7 × 22.5 m (466 m²)
- Street side faces
- 75° (0 = north)
- Setbacks front / rear / left / right
- 3.7 / 6.3 / 1.9 / 2.1 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- no, street-entered dwellings
- Open space, net of parking
- ≥ 32% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.503
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 2BR | all | 63 | entry, living, kitchen, bathroom, circulation, bedroom primary, bedroom secondary, bathroom, circulation |
| U1 | 3BR | all | 84 | entry, living, dining, kitchen, bathroom, circulation, bedroom primary, bedroom secondary, bedroom secondary, bathroom, circulation |
| U2 | 2BR | all | 63 | entry, living, kitchen, bathroom, circulation, bedroom primary, bedroom secondary, bathroom, circulation |
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 | 1180 | 5.7 | |
| Random search | 0% | 0.000 | 1500 | 7.4 | |
| Simulated annealing | 0% | 0.000 | 1500 | 7.3 | |
| NSGA-II | 0% | 0.000 | 1500 | 8.5 | |
| CP-SAT | 0% | 0.000 | 0 | 4.6 | solver timeout |
| Random sketch + repair | 33% | 0.045 | 1500 | 9.1 | repair collapse |
| Heuristic-seeded NSGA-II | 0% | 0.000 | 1500 | 8.8 | 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 |
|---|---|---|---|---|---|---|---|---|
| Heuristic | 53% | 100% | 44% | – | 0% | 4% | 0% | 100% |
| Random search | 86% | 100% | 100% | 15% | 10% | 78% | 95% | 60% |
| Simulated annealing | 59% | 87% | 74% | 3% | 4% | 56% | 80% | 53% |
| NSGA-II | 57% | 79% | 66% | 4% | 3% | 94% | 38% | 19% |
| Random sketch + repair | 63% | 79% | 78% | 4% | 17% | 35% | 74% | 37% |
| Heuristic-seeded NSGA-II | 62% | 99% | 78% | 1% | 2% | 70% | 90% | 19% |