| Summary: | 碩士 === 國立臺灣海洋大學 === 商船學系所 === 101 === Tramp ships have to queue at the anchorage frequently due to short of their specific berths. The transport economists suggest executing a queuing pricing policy for a busy port to eliminate or reduce queuing time spent. In the current literatures of queuing pricing model for tramp ships, length of queuing time is the crucial key point to calculate the equilibrium cost and derive the toll structure. However, these literatures only consider the average berthing time per ship to calculate the length of queuing time. This consideration is too simple for harbor decision makers to decide implementing the queuing pricing to tramp ships. In order to improve the current model for practice, this research considers two sub-models of harbor pilotage services as well as nonidentical cargo handlings to develop the model of length of queuing time at the anchorage.
Harbor pilotage services mean pilots or tugboats help guiding ships in and out the harbor safely. Owing to the limited manpower or equipment available, the pilotage service sub-model is developed to compute the time spent on guiding ships in the harbor. On the other hand, the nonidentical cargo handling sub-model is developed to compute the time spent on loading/unloading nonidentical cargos by the number of cargo handling equipments, and mechanical efficiency of the equipments. The length of queuing time in this research is constituted by the totally time of the two sub-modules subtracting the time non-effective to the queue. Based on this model, it would be helpful to derive each tramp ship’s equilibrium cost, a series of queuing toll scheme and the result of dispersing arrival time for tramp ships after implementing toll collection. The above descriptions have not yet been concerned with the current literatures. The fruitful results of this research will be expectable to make the queuing pricing theory become more complete and practical.
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