Abstract
The quay crane is a crucial resource constraint for the scheduling of loading and discharging tasks in a container terminal. The stability of the vessels should also be carefully considered so that a feasible schedule is produced. However, the latter constraint has been inadequately abstracted in previous studies on schedule optimization of quay cranes; this inadequacy has led to infeasible schedules. Therefore, a mixed-integer linear programming model was developed to incorporate the stability of vessels. In addition, a steady state genetic algorithm was designed to solve the schedule optimization problem. The results of virtual cases indicate that the proposed optimization tool can resolve the model by considering quay crane constraints, as well as taking vessel stability into account, and thereby can produce a more feasible schedule.
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