碩士 / 國立交通大學 / 運輸科技與管理學系 / 91 / Since the rise of containerization, containerships have become major players, instead of general cargo ships, in the liner shipping market. Over last two decades, due to the upgrade of the port containerization and efficient handling of containers, and the technology of ship building, the size of the containerships on the main routes increases in every ten-year period (McLellan, 1997). There are two significant meanings for using large containerships in the ocean transportation market: the establishment of hub-and-spoke networks and the decrease of the unit transportation cost.
Most of previous researches in scale economies of ships, such as Jannson and Shneerson (1982), Talley (1990), Lim (1994) and McLellan (1997), focused on the goal of minimizing the unit operation cost, and the influence of changing ship size on the operation cost. However, what shipowners pursuing is to maximize the profit, which equals revenue minus operation cost. Bigger ships or faster speed will increase not only operation cost but also the revenue. The key point is whether the resulting profit can be increased or not.
This paper attempts to formulate a profit maximization model for analyzing the optimal containership size, given the route of ships, to determine the optimal size and/or speed of ships to earn the maximum profit for shipowners. The methods of research are regression analyses of ship costs, which establish the size and/or speed regression functions to the ship costs. And then the objective function can be formulated, whose optimal solution can be solved by nonlinear programming methods.
This model takes ship size and speed into account, and hence can reach a more concrete and practical result than those before.
The objective function is a strictly concave function as expected. The main conclusion is that when shipowners pursuing a maximizing profit, the bigger ship size is better and the speed of ship is allowed to be slower.
| Identifer | oai:union.ndltd.org:TW/091NCTU0423014 |
| Date | January 2003 |
| Creators | Chong-You Guo, 郭重佑 |
| Contributors | Shang-Hsing Hsieh, 謝尚行 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 57 |
Page generated in 0.0227 seconds