hard · flats · 2 storeys
B0017: a triplex on a 16.3 × 19.4 m lot
3 dwellings, 18 rooms. No method found a design meeting every constraint within the budget.
Requirements
- Lot
- 16.3 × 19.4 m (316 m²)
- Street side faces
- 165° (0 = north)
- Setbacks front / rear / left / right
- 5 / 4.5 / 1.1 / 2 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 25% of the lot
- Parking spaces
- 1
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.764
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 2BR | 0 | 63 | entry, living, kitchen, bathroom, bedroom primary, bedroom secondary |
| U1 | 2BR | 0 | 63 | entry, living, kitchen, bathroom, bedroom primary, bedroom secondary |
| U2 | 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 | 0% | 0.000 | 466 | 1.1 | |
| Random search | 0% | 0.000 | 1500 | 3.6 | |
| Simulated annealing | 0% | 0.000 | 1500 | 3.0 | |
| NSGA-II | 0% | 0.000 | 1500 | 3.9 | |
| CP-SAT | 0% | 0.000 | 0 | 0.1 | solver infeasible |
| Random sketch + repair | 0% | 0.000 | 1500 | 4.1 | repair collapse |
| Heuristic-seeded NSGA-II | 0% | 0.000 | 1500 | 4.6 | repair collapse |
Mean over 1 seeds (the heuristic is deterministic: one run).
Closest attempts that failed
For methods that found nothing feasible: their least-infeasible design, with its violations marked on its page.
Convergence on this brief
Archive hypervolume against evaluations, mean over seeds.
What stopped designs here
| method | C01 | C04 | C05 | C06 | C07 | C08 | C09 | C10 | C11 |
|---|---|---|---|---|---|---|---|---|---|
| Heuristic | – | 29% | 69% | 100% | 100% | – | 1% | 11% | 1% |
| Random search | – | 100% | 100% | 96% | 100% | 41% | 91% | 81% | 96% |
| Simulated annealing | 7% | 79% | 90% | 69% | 93% | 14% | 62% | 61% | 53% |
| NSGA-II | – | 66% | 96% | 51% | 100% | 9% | 56% | 59% | 75% |
| Random sketch + repair | – | 56% | 93% | 73% | 100% | 18% | 52% | 97% | 81% |
| Heuristic-seeded NSGA-II | – | 43% | 93% | 84% | 100% | 6% | 18% | 33% | 19% |