%0 Journal Article %T Multi-objective Job Shop Scheduling Using Pre-emptive Constraint Procedure %A Jaber S. Alzahrani %J American Journal of Modeling and Optimization %D 2019 %R 10.12691/ajmo-7-1-2 %X In this paper, a multi-objective job shop scheduling through the pre-emptive constraint procedure has been formulated to optimize makespan, total earliness and total tardiness. The effectiveness of the model is studied through eighteen 3J*3M and three 10J*10M problems. The model is solved using Mosel language with Xpress software %U http://www.sciepub.com/AJMO/abstract/10476