easy · maisonette · 2 storeys
B0022: a rowhouse on a 18.3 × 25.5 m lot
3 dwellings, 29 rooms. The pooled front across all methods holds 82 nondominated designs.
Requirements
- Lot
- 18.3 × 25.5 m (467 m²)
- Street side faces
- 90° (0 = north)
- Setbacks front / rear / left / right
- 3.8 / 6.6 / 2 / 1.2 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- no, street-entered dwellings
- Open space, net of parking
- ≥ 39% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.461
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 | 683 | 3.0 | |
| Random search | 0% | 0.000 | 1500 | 7.0 | |
| Simulated annealing | 33% | 0.035 | 1500 | 6.9 | |
| NSGA-II | 33% | 0.034 | 1500 | 7.8 | |
| CP-SAT | 0% | 0.000 | 0 | 4.6 | solver timeout |
| Random sketch + repair | 67% | 0.054 | 1500 | 6.6 | repair collapse |
| Heuristic-seeded NSGA-II | 0% | 0.000 | 1500 | 5.9 | 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 | 90% | 100% | 99% | – | 1% | 14% | 99% | 100% |
| Random search | 74% | 100% | 100% | 6% | 6% | 79% | 96% | 54% |
| Simulated annealing | 55% | 93% | 88% | 3% | 3% | 61% | 80% | 28% |
| NSGA-II | 51% | 86% | 77% | 1% | 2% | 62% | 87% | 21% |
| Random sketch + repair | 45% | 95% | 87% | 4% | 2% | 43% | 81% | 39% |
| Heuristic-seeded NSGA-II | 66% | 95% | 70% | 1% | 2% | 65% | 100% | 20% |