• 한국경영과학회지
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• 제24권4호
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• pp.63-80
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• 1999

In the container transportation of inland depots the empty container is an important issue. The truck dispatching problem in this paper is considered under restriction about empty containers. When a full container arrives in a depot by truck, after unloading operation the full container is changed to an empty container. After loading operation an empty container is changed to a full container. We suggest an integrated approach to the problem of simultaneously managing empty truck and container movements. We suggest an integrated approach to the problem of simultaneously managing empty truck and container movements. We would like to find the truck dispatching method minimizing empty truck movements and empty container movements. In this paper, a mixed integer programming model is developed to obtain the optimal truck dispatching in container transportation and heuristic is developed to give a good solution in much shorter time. The numerical examples are studied and the proposed heuristic is also compared with the result of numerical examples.

• 한국멀티미디어학회논문지
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• 제22권9호
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• pp.1055-1068
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• 2019

As the container market is expected to continue to increase, the volume of containers will increase, and the volume of empty containers will be proportional to this. Imbalances between imports and exports in each country have emerged, and the issue of collection and storage of empty containers is becoming more and more important, and it is necessary to appropriately deal with container demand for container presents. Therefore, in this paper, we are trying to develop a website that provides various empty container information and provides empty container leasing services based on this information. Through the development of these empty container websites, we would like to make empty container leasing and operations more efficient, improve empty container-related services and reduce costs.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2009년도 추계학술대회
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• pp.185-186
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• 2009

컨테이너 화물의 물동량이 증가함에 따라 공컨테이너의 처리 요구량도 함께 증가하여 왔으며 이에 따른 공컨테이너의 재배치 문제에 관한 연구가 꾸준히 이루어져 왔다. 하지만 컨테이너화물의 처리가 공컨테이너의 처리와 함께 이루어지지는 않는다. 더욱이 우리나라 같이 ICD(Inland Container Depot)와 ODCY(Off-Dock Container Yard) 와 같은 내륙 거점이 많은 환경에서는 그 거점에서 필요로 하는 공컨테이너의 수요에 따른 재배치 연구가 필요하나 이와 같은 연구는 많이 이루어지지는 않았다. 이 논문에서는 컨테이너 터미널과 ICD, ODCY와 같은 거점에서 필요로 하는 공컨테이너의 수요량에 따른 합리적인 재배치 모형을 수립하고 분석하도록 한다. 또한 과거와 동일하게 시행되고 있는 현재의 재배치 방식을 개선하여 비용 절감 효과를 높이는데 도움이 되도록 한다.

• 산업공학
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• 제23권2호
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• pp.89-99
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• 2010

Containers are commonly used as an effective and relatively inexpensive method for transporting goods. Unfortunately, there are often imbalances between the number of import and export containers, and some ports have a surplus of empty containers while others have a deficit. The Empty Container Simulation Game was developed to address these problems. The game is a computer role playing simulation that simulates the distribution of empty containers in order to solve empty container imbalances among ports. An optimal solution is obtained by the computer using linear programming (LP). Upon completion of the game, a player's game results are displayed along with the LP solution. The game interface was designed to provide easy access and operation. This game will serve to provide an easy understanding and planning for empty container management.

• 한국항만학회지
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• 제10권2호
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• pp.51-59
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• 1996

The management of liner shipping company is an extremely complex activities, especially if a company aims to simultaneously optimize the cost and service of the company's operations in a competitive environment. This paper investigates the control process of containers in a typical container liner shipping and proposes day by day operational model for empty container control in the maritime container transportation system. We proposed a linear programming model for empty container control in container liner shipping and the computational results show utilities of the model.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.2
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• pp.157-164
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• 2006

This paper addresses the design of container liner shipping service networks by explicitly taking into account empty container repositioning and container fleet size. Two key and interrelated issues of deployments of ships and containers are usually treated separately by most existing studies on shipping network design. In this paper, both issues are considered simultaneously. The problem is formulated as a two-stage problem: the upper-problem being formulated as a Knapsack problem and the lower-problem as a Flow problem. A genetic algorithm based heuristic is developed for the problem. Through a number of numerical experiments that were conducted it was shown that the problem considering empty container repositioning provides a more insightful solution than the one without.

• 한국항해학회지
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• 제24권1호
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• pp.65-72
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• 2000

This paper deals with the development of the generalized model to assist the empty container repositioning and leasing problems for liner shipping companies. For this, the existing models have been reviewed. And then a mathematical model has been proposed to handle the specific characteristics of the empty container management; the dynamic characteristics, the multi echelon of the transportation and distribution systems, and the substitutions among various container types. In particular, this paper puts an emphasis on the modeling framework for considering substitutions among various container types.

• 산업공학
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• 제24권2호
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• pp.164-172
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• 2011

H maritime company in Korea had a long history of difficulty in obtaining enough empty containers to transport its commodities. Despite efforts to resolve the problem, the repositioning of empty containers between depots was still planned manually, which consumed much worker time. To automate the generation of reposition plans, we developed a planning system to optimize the company's reposition of empty containers between global depots with a linear programming model functioning as a key decision engine in the system. The model determines the route, volume and mode of transportation for repositioning empty containers from depots with surplus containers to those requiring containers, as well as the empty space of ships generated from the unloading or loading of full and empty containers. The system has been in operation in the company's global network since March 2008.

• 대한산업공학회지
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• 제35권1호
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• pp.92-100
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• 2009

Today international trade through maritime transportation is significantly increasing. Due to this increase, shipping companies are faced with problems concerning the repositioning of empty containers from import dominant ports. The liner shipping service network has been provided to transport containers which load customers' freights. Container ships are moved on the liner shipping service network by observing the predetermined route and transportation time. This research deals with the empty containers distribution problem considering the container ship route. A mathematical model based on the mixed integer program has been introduced in this study. The objective is to minimize the total relevant costs of empty containers such as handling, leasing, and inventory holding, etc. Due to the complexity of the problem, a genetic algorithm has been suggested to solve large sized problems within a reasonable time. Numerical experiments have been conducted to show the efficiency of the genetic algorithm.

• 한국항만학회지
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• 제13권1호
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• pp.27-40
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• 1999

This study aims to apply and examine the stochastic approach for empty container repositioning and leasing problem. For this a case study has been carried out on actual data such as various cost components and traffic flow. The results reveal that the proposed methodology produces more realistic results than the conventional deterministic approaches. It is also found that the results are significantly affected by the accuracy of demand and supply forecast.