| Article ID: | iaor20081705 |
| Country: | China |
| Volume: | 23 |
| Issue: | 4 |
| Start Page Number: | 717 |
| End Page Number: | 720 |
| Publication Date: | Aug 2006 |
| Journal: | Chinese Journal of Engineering Mathematics |
| Authors: | Wang Jibo, Jiang Bo |
We considered the scheduling problem with the objective of minimizing the discounted total weighted completion time. The invariability of optimal schedules when the processing times vary in some closed interval is studied. The sufficient and necessary conditions for the invariant of the optimal schedules have been achieved.