medium · maisonette · 2 storeys
B0028: a rowhouse on a 22.2 × 26.7 m lot
3 dwellings, 27 rooms. The pooled front across all methods holds 383 nondominated designs.
Requirements
- Lot
- 22.2 × 26.7 m (593 m²)
- Street side faces
- 135° (0 = north)
- Setbacks front / rear / left / right
- 4.4 / 7.8 / 1.3 / 1.6 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- no, street-entered dwellings
- Open space, net of parking
- ≥ 27% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.338
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 2BR | all | 63 | entry, living, kitchen, bathroom, circulation, bedroom primary, bedroom secondary, bathroom, circulation |
| U1 | 2BR | all | 63 | entry, living, kitchen, bathroom, circulation, bedroom primary, 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 | 100% | 0.169 | 582 | 2.6 | |
| Random search | 0% | 0.000 | 1500 | 5.9 | |
| Simulated annealing | 33% | 0.047 | 1500 | 5.8 | |
| NSGA-II | 100% | 0.161 | 1500 | 6.8 | |
| CP-SAT | 33% | 0.020 | 2 | 5.3 | solver timeout |
| Random sketch + repair | 33% | 0.028 | 1500 | 5.4 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.147 | 1500 | 6.0 | 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 | 5% | 50% | 41% | – | 0% | 7% | 17% | 1% |
| Random search | 33% | 100% | 100% | 0% | 3% | 71% | 92% | 33% |
| Simulated annealing | 32% | 73% | 82% | 0% | 8% | 55% | 51% | 62% |
| NSGA-II | 21% | 75% | 72% | 0% | 2% | 22% | 37% | 18% |
| Random sketch + repair | 35% | 73% | 77% | 0% | 1% | 35% | 63% | 50% |
| Heuristic-seeded NSGA-II | 11% | 82% | 70% | 0% | 1% | 20% | 24% | 10% |