easy · flats · 2 storeys
B0005: a triplex on a 15.8 × 20.8 m lot
3 dwellings, 16 rooms. The pooled front across all methods holds 467 nondominated designs.
Requirements
- Lot
- 15.8 × 20.8 m (329 m²)
- Street side faces
- 270° (0 = north)
- Setbacks front / rear / left / right
- 3.1 / 5.5 / 2.4 / 1.2 m
- Storeys × height
- 2 × 2.8 m
- Shared core
- yes (access gallery + stair)
- Open space, net of parking
- ≥ 38% of the lot
- Parking spaces
- 0
- Courtyard
- not required
- Tightness (programme / buildable volume)
- 0.557
Programme
| Dwelling | Type | Storey | Min m² | Rooms |
|---|---|---|---|---|
| U0 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| U1 | 1BR | 0 | 46 | entry, living, kitchen, bathroom, bedroom primary |
| 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 | 100% | 0.154 | 424 | 1.9 | |
| Random search | 0% | 0.000 | 1500 | 3.6 | |
| Simulated annealing | 33% | 0.014 | 1500 | 3.1 | |
| NSGA-II | 67% | 0.058 | 1500 | 3.6 | |
| CP-SAT | 100% | 0.056 | 17 | 6.7 | |
| Random sketch + repair | 33% | 0.023 | 1500 | 3.5 | repair collapse |
| Heuristic-seeded NSGA-II | 100% | 0.136 | 1500 | 4.7 |
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 | 1% | 37% | 31% | – | – | 1% | 2% | 1% |
| Random search | 83% | 100% | 100% | 83% | 22% | 84% | 60% | 93% |
| Simulated annealing | 57% | 90% | 82% | 38% | 10% | 70% | 58% | 60% |
| NSGA-II | 41% | 81% | 61% | 37% | 9% | 51% | 44% | 58% |
| Random sketch + repair | 58% | 65% | 83% | 11% | 9% | 41% | 64% | 63% |
| Heuristic-seeded NSGA-II | 14% | 59% | 42% | 7% | 5% | 20% | 28% | 20% |