Table 4.
Objective values and solution time of 8-farm cases from period 12 to period 18.
| Objective value (unit cost) |
Solution time (sec.) |
||||||
|---|---|---|---|---|---|---|---|
| Problem Instances | Period | Lingo (LB) | Lingo (UB) | OPT | HEU | Lingo (UB) | HEU |
| 8F–12P | 12 | 714020 | 714020 | 714020 | 714020 | 13 | 40 |
| 8F–13P | 13 | 702898 | 702898 | 702898 | 702981 | 35 | 48 |
| 8F–14P | 14 | 709285 | 709285 | 709285 | 709662 | 68 | 57 |
| 8F–15P | 15 | 681264 | 681264 | 681264 | 681596 | 821 | 94 |
| 8F–16P | 16 | 698942 | 698942 | 698942 | 698942 | 701 | 107 |
| 8F–17P | 17 | 631255 | 646806 | a | 646806 | 3755 | 222 |
| 8F–18P | 18 | 685145 | 694729 | a | 694729 | 3480 | 219 |
a
No optimal solution found within 2 h.