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*Graduate school of National Korea Maritime University, Busan 606-791, Korea†Dept. of Logistics Engineering, National Korea Maritime University, Busan 606-791, Korea  :          .  Q/C(Quay Crane)     . Q/C        Y/T(Yard Tractor)  .   ( )     .              .           . ,  dedicate  pooling   .               .       . :  ,  ,  ,  ,  ,  Abstract :At container terminals, a major measurement of productivity can be work-efficiency in quay-side. At the apron, containers are loaded onto the ship and unloaded to apron by Q/C(Quay Crane). For improving the productivity of quay crane, the more efficient Y/T(Yard Tractor) operation method is necessary in container terminals. Between quay-side and yard area, current transferring methods is single-cycling which doesn't start loading unless it finishes unloading. Dual-cycling is a technique that can be used to improve the productivity of quay-side and utility of yard tractor by ship loading and unloading simultaneously. Using the dual-cycling at terminals only necessitates an operational change without purchasing extra equipment. Exactly, Y/T operation method has to be changed the dedicate system to pooling system. This paper presents an efficient ship loading and unloading plan in container terminals, which use the dual-cycling. We propose genetic and tabu search algorithm for this problem.Key words :container terminal, double cycle, dual cycle, crane scheduling, genetic algorithm, tabu search*  : (), ccy1443@hhu.ac.kr 010-6400-7974† :  shinjy@hhu.ac.kr 051)410-4335

Dual Cycle Plan for Efficient Ship Loading and Unloading in Container Terminals