2, *, *) (2, 1, *, *) (2, 3, *, *) (1, 2, *, *) (1, 3, *, *) Illustrative Example: Bounding Operation #2 Set of permutations of 4 jobs (2, *, *, ) (1, *, *, *) (4, *, *, *) (3, *, *, *) (2, 4, *, *) 560 570 560 (4, 3, *, *) 570 550 (1, 4, *, *) 570 (1, 4, 2, 3) (1, 4, 3, 2) 580 (3, 1, *, *) (3, 2, *, *) (3, 4, *, *) 550 550 580 540 490 550 510 640 540 610 620 (4, 3, 1, 2) (4, 3, 2, 1) 580 610 (3, 4, 1, 2) (3, 4, *, 1) 590 580 (3, 2, 1, 2) (3, 2, 4, 1)