easy · maisonette · 2 storeys
B0004: a rowhouse on a 18.5 × 25 m lot
3 dwellings, 27 rooms. The pooled front across all methods holds 118 nondominated designs.
Requirements
- Lot
- 18.5 × 25 m (463 m²)
- Street side faces
- 45° (0 = north)
- Setbacks front / rear / left / right
- 6.1 / 7 / 1.4 / 1.2 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- no, street-entered dwellings
- Open space, net of parking
- ≥ 29% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.499
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 | 0% | 0.000 | 829 | 2.4 | |
| Random search | 0% | 0.000 | 1500 | 4.6 | |
| Simulated annealing | 0% | 0.000 | 1500 | 4.4 | |
| NSGA-II | 0% | 0.000 | 1500 | 5.2 | |
| CP-SAT | 33% | 0.018 | 2 | 5.4 | solver timeout |
| Random sketch + repair | 67% | 0.086 | 1500 | 6.8 | repair collapse |
| Heuristic-seeded NSGA-II | 0% | 0.000 | 1500 | 6.8 | 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 | 49% | 100% | 34% | – | 0% | 5% | 31% | 0% |
| Random search | 85% | 100% | 100% | 13% | 9% | 73% | 94% | 40% |
| Simulated annealing | 66% | 93% | 91% | 8% | 4% | 60% | 60% | 49% |
| NSGA-II | 56% | 89% | 76% | 2% | 4% | 77% | 58% | 19% |
| Random sketch + repair | 62% | 85% | 77% | 9% | 9% | 39% | 59% | 62% |
| Heuristic-seeded NSGA-II | 49% | 73% | 50% | 0% | 2% | 28% | 91% | 9% |