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Mathematical Problems in Engineering
Volume 2016 (2016), Article ID 6124734, 12 pages
Research Article

Minimizing Total Earliness and Tardiness for Common Due Date Single-Machine Scheduling with an Unavailability Interval

1Department of Industrial Engineering and Management, National Yunlin University of Science and Technology, 123 University Road, Douliou, Yunlin 64002, Taiwan
2Department of Industrial Engineering and Management, National Chiao Tung University, 1001 University Road, Hsinchu 30010, Taiwan

Received 23 March 2016; Accepted 6 June 2016

Academic Editor: Miguel A. Salido

Copyright © 2016 Chinyao Low et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper addresses the problem of scheduling independent jobs on a single machine with a fixed unavailability interval, where the aim is to minimize the total earliness and tardiness (TET) about a common due date. Two exact methods are proposed for solving the problem: mixed integer linear programming formulations and a dynamic programming based method. These methods are coded and tested intensively on a large data set and the results are analytically compared. Computational experiments show that the dynamic programming method is efficient in obtaining the optimal solutions and no problems due to memory requirement.