From\To | W1 | W2 | W3 | Availability ai |
S1 |
| 4 (6) | X | 14 ? 6 = 8 |
S2 | X | 5 (4) | 8 (6) | 0 |
S3 | X | X | 7 (6) | 0 |
Requirement bj | 8 | 0 | 0 | 8 |