The problem of quay crane scheduling not only considers the arrangement of service time windows, but also needs to avoid crossing each other and to assign neighbored cranes for a vessel.

• 通常货柜码头均配置多部桥式起重机以利相互支援，但在进行排程规划时，除需安排各自于各船之作业时窗外，仍要考虑相互禁止跨越，以及同一船舶需由相邻机具服务之限制。