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Trans. Planning Journal
| Title | Ship Size and Sailing Frequency Decision-Making for Container Liners |
|---|---|
| Author | Chaug-Ing Hsu, Yu-Ping Hsieh |
| Summary | On this study, we formulated a two-objective model by minimizing both shipping costs and inventory costs to decide ship size and sailing frequency for container liners. First, shipping and inventory cost functions are formulated for a multi- port calling route. Shipping costs include capital and operating cost, fuel cost, and port charges, while inventory costs include waiting time cost and shipping time cost. Furthermore, we derived a trade-off equation between shipping costs and inventory costs that shows all solutions of ship size and sailing frequency, and identified that it is a hyperbola function, which could be shown in objective value space. Accordingly, Pareto optimal solutions of the two-objective model are then determined, and ship size and sailing frequency decision analysis can be made. The optimum ship size for each level of inventory cost is shown and the effects of inventory costs, economies of ship size, and service speed on decision are also illustrated. Besides, we derived the relationship between the optimum ship size and container flow, and showed that the optimum ship size tended to be the ship with the minimum shipping cost as container flow increases. Finally, a case study regarding Transpacific Northwest Service justified the theoretical findings. |
| Vol. | 34 |
| No. | 2 |
| Page | 211 |
| Year | 2005 |
| Month | 6 |
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