hard · flats · 2 storeys
B0050: a duplex on a 14 × 17.5 m lot
2 dwellings, 12 rooms. The pooled front across all methods holds 318 nondominated designs.
Requirements
- Lot
- 14 × 17.5 m (245 m²)
- Street side faces
- 285° (0 = north)
- Setbacks front / rear / left / right
- 4.1 / 5 / 1.9 / 1.6 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 27% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.766
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 2BR | 0 | 63 | entry, living, kitchen, bathroom, bedroom primary, bedroom secondary |
| U1 | 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 | 100% | 0.122 | 261 | 0.8 | |
| Random search | 0% | 0.000 | 1500 | 3.2 | |
| Simulated annealing | 100% | 0.060 | 1500 | 3.3 | |
| NSGA-II | 67% | 0.066 | 1500 | 4.4 | |
| CP-SAT | 100% | 0.093 | 45 | 6.8 | |
| Random sketch + repair | 67% | 0.052 | 1500 | 3.4 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.056 | 1500 | 3.2 | 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 | 20% | 49% | 27% | 1% | – | 0% | – | 0% |
| Random search | 88% | 99% | 70% | 94% | 28% | 78% | 49% | 88% |
| Simulated annealing | 49% | 78% | 43% | 39% | 12% | 50% | 22% | 43% |
| NSGA-II | 31% | 66% | 29% | 33% | 8% | 39% | 22% | 48% |
| Random sketch + repair | 58% | 75% | 65% | 9% | 12% | 32% | 24% | 43% |
| Heuristic-seeded NSGA-II | 39% | 86% | 61% | 23% | 7% | 29% | 15% | 22% |