• Journal of Applied Reliability
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• v.11 no.3
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• pp.305-318
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• 2011

In the statement of logistics reliability prediction methodology, all components should be managed as the analysis objectives. However, in some reliability prediction of weapon systems, fastening parts, e.g., screws, bolts and nuts, have been frequently ignored because some organizations related to weapon systems have emphasized that those parts are not significant in their failures rate and functions. In this paper, failure rates, modes, and distributions were presented to prove that fastening parts should be included in reliability prediction objectives. Also, failure rate prediction methods of fastening parts are presented and compared.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.3256-3263
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• 2011

Large scaled railway freight transportation facilities in harbors are located in Busan port and Gwangyang port. The port rail depot plays an important role as the departure and destination function of railway logistics. However, presently, it is not relatively vitalized because it is not reflect the railway freight transportation's characteristics such as scale of railway tracks or yards area. In addition, even if port rail depot is vitalized, processing capacity is already saturated. Therefore, it is difficult to increase rail transport quantity. To activate railway container transportation business, it is very necessary to recalculate the facility size of port rail depots. Focused on the Busan new port rail depot, this paper analyzes the problems of port rail depot facility that has currently opened and finds some alternatives to resolve them.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.10a
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• pp.185-186
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• 2009

According to increase of container transportation, demands of empty container handling has been increasing, so research of empty container has been studied steadily. However, the handling of containers and empty containers is not handled simultaneously. Moreover, as Korean ICD(Inland Container Depot) and ODCY(Off-Dock Container Yard), the inland depot in many environments, relocation research due to demand of empty container has not been studied sufficiently. This paper formulates and analyzes logical mathematical relocation model according to demands of empty container which are required in container terminal, ICD, and ODCY as cargo depots. This paper also aims to help reduce cost by improving q current empty container relocation as same as the past procedure.

• Journal of the Korea Safety Management & Science
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• v.12 no.4
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• pp.175-181
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• 2010

The government have plans to improve the railway transport capacity and transport hub for the sustainable national transport and logistics system. Specially, there are much efforts to improve transportation capacity such as high speed transportation of rail freight, enlargement of BT train, development of double stack train, etc. between railway transport hubs. If the transport capacity between railway logistics hubs is increased as planned, we must increase the handling capacity of railway hub terminals. But there are limits to enlarge the terminal infrastructure because of investment scale, location circumstances and urban development plans. To ensure the capacity, with the minimum required enlargement of infrastructure, it is necessary to extremely increase the efficiency of terminal operations. For improving the efficiency, we have to introduce the efficient terminal operation systems based on u-IT and operation optimize technologies. In this paper, we analyse the issues and problems of railway terminals(including ICD) and suggest the concept of intelligent railway terminal and the construction components of technology.

• Journal of Korea Port Economic Association
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• v.25 no.3
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• pp.165-182
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• 2009

The purpose of this paper is to study on the third party logistics service enforcement of inland container depot at Pusan area. The main results of this paper are as follows: First, the inland container depot related to location selecting factor researches analyzed and korean TPL market reviewed. Second, the TPL service function reinforcement method and investments are mentioned. In detail the 9 factors are as follows: competitive high position and improvements of harbor back complex, ICD goods enterprise investment strategies, the harbor back which is inexpensive only the rent, taxes benefit and incentive, site security and base facility expansion, the goods service provision which is flexible, connection plan construction of goods enterprise, the incentive strategic establishment which is discriminated, the marketing activity which is long-term. and lastly the ICD and TPL Policy are needed that government and logistic enterprise's cooperation gains competitive advantage.

• Journal of the Korea Society for Simulation
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• v.26 no.3
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• pp.23-34
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• 2017

This paper is to study the simulation model of depot maintenance system that analyzes logistics supportability such as component availability and cost of target equipment. A depot maintenance system could repair or maintain multiple components simultaneously. The key performance indicators of this system are component availability, repair cycle time, and maintenance cost. The simulation model is based on the engine maintenance process of army aviation depot. This study combines the NOLH(Nearly Orthogonal Latin Hypercube) experimental design method, to composes 33 scenarios, with a multiple regression analysis to find out major factors that influence on key performance indicators. This study is significant in providing a cost-effectiveness analysis on depot maintenance system that is capable of maintaining multiple components at the same time.

• Journal of Korean Port Research
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• v.7 no.2
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• pp.69-90
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• 1993

Today, the problem of the logistics rationalization has significant meanings as one of the new strategies for improving the power in the international competition. In order to achieve the logistics rationalization, the enhanced recognition to logistics of each enterprise is essential. However, the complete arrangement of the logistics external environment, that is, logistics infrastructure is also one of the most important matters. In this respect, to rationalize the container logistics, this paper deals with the strategies for strengthening the function of Pusan port which is handling the 95% of the export and import container. Some suggestions for those are as follows : First, the coastal container transportation system must be strengthened to dissolute the preponderance of road transportation. Second, a new large port must be developed at Gadeok island to handle the increasing container traffic in the years of 2000. Third, the port authority must be established under the cooperation of the central government and local government to comply with the necessity of the synthetic control for city and port. Fourth, the Inland Clearance Depot in going must be promptly completed to establish the efficient and synthetic container logistics system.

• Industrial Engineering and Management Systems
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• v.13 no.2
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• pp.163-171
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• 2014

Under amazing increase in markets and certain demand on qualified service in the delivery system, global logistic optimization is becoming a keen interest to provide an essential infrastructure coping with modern competitive prospects. As a key technology for such deployment, we have been engaged in the practical studies on vehicle routing problem (VRP) in terms of Weber model, and developed a hybrid approach of meta-heuristic methods and the graph algorithm of minimum cost flow problem. This paper extends such idea to multi-depot VRP so that we can give a more general framework available for various real world applications including those in green or low carbon logistics. We show the developed procedure can handle various types of problem, i.e., delivery, direct pickup, and drop by pickup problems in a common framework. Numerical experiments have been carried out to validate the effectiveness of the proposed method. Moreover, to enhance usability of the method, Google Maps API is applied to retrieve real distance data and visualize the numerical result on the map.

• Journal of the Korean Operations Research and Management Science Society
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• v.18 no.2
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• pp.157-173
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• 1993

Reliability growth modeling can be a requirement when bidding on large military hardware systems. Under current reliability warranty legislature, the reliability growth model can be later translated into necessary reliability performance which must be demonstrated over an extended period of usage. In this paper the modeling situation is concerned with determining the number of spares needed to support a projected reliability growth both at the fightine and in a depot inventory. The model differs from existing models for logistics planning in that we allow for the phenomena of reliability growth. The model can also be used to determine central depot staffing requirements based upon a specified system utilization.

• Proceedings of the KAIS Fall Conference
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• 2004.06a
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• pp.339-341
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• 2004

본 연구는 생산 공장, 거점창고, 지역창고, 대리점으로 이어지는 일련의 SCM상에서 효율적인 제품수송을 위한 중간창고의 통폐합을 실데이터를 이용하여 물류비 절감 사례를 보여주고 있다. 이를 위해 현재 S사의 물류운영 상황을 제품수송의 관점에서 파악하고 정리한다. 이를 통하여 총물류비의 계산식을 도출하며 현재의 물류비를 계산한다. 총물류비 절감을 위한 휴리스틱적인 방법을 이용하여 총물류비가 최소화되는 거점창고, 지역창고의 수를 결정한다. 마지막으로 결정된 거점창고와 지역창고의 총물류비를 계산함으로써 제안 안의 효율성을 기술하고 있다.