• Journal of Korean Society of Industrial and Systems Engineering
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• v.26 no.1
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• pp.85-94
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• 2003

In this paper, a mathematical model is developed for economic design of multi-stage distribution system that consists of factory, central distribution centers, local distribution centers and retailers. The retailers are supplied products from different stage suppliers according to order size. The retailers are supplied products from factory if demand amount is large, central distribution center if medium, local distribution center if small. The economic design is to determine the economic size of facility factors that consist of distribution system. The cost factors are transportation cost from supply places to demand places, handling cost at distribution centers and inventory holding cost at retailers. It is to determine the transportation route of each retailer, the size and number of the vehicle at factory and distribution centers, the handling amount at distribution centers in order to minimize the total costs. The mathematical model is represented, the solution procedure is developed, and a numerical example is shown.

• Journal of the Korea Society of Computer and Information
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• v.5 no.4
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• pp.200-210
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• 2000

Distribution Activity for customer is preferred at Physical distribution system in e-commerce, so fast delivery and low distribution cost determine the core competency of enterprise. Because there is no cooperative system between with distribution centers in traditional distribution system, it is difficult to optimize the system. The purpose of this paper is to propose a cost structure model for multi-stage distribution system, which is used for determination of joint lot size and optimal demand and transportation policy. It is expected to contribute to development of algorithm for joint distribution system, which is minimized the transportation cost by the result of this cost structure model.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1098-1101
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• 2013

물류업계는 배차 운송하기 위한 많은 알고리즘, 차량경로문제, 차량일정계획, GIS, GPS 등의 여러 연구를 진행하고 있다. 하지만 물류시장에 배송물량은 늘어나지만 배송을 하기 위한 차량과 기사는 한정되어 있으며 다단계 거래구조로 인해 수수료가 발생하여 최말단에 있는 화물차주만 수익이 감소한다. 이런 문제에 의해 차량주인(차주)는 운송장소와 운송비에 중점을 두고 배송 건을 선택하여 운송을 하고 있다. 본 논문에서는 이러한 물류기업의 배차문제와 차주 운임비 문제 해결을 위하여 운송비 기반배차 시스템의 정보화를 실현하기 위한 기초적인 데이터 구조를 제안하고, 운송비 중심의 배차 알고리즘이 적용된 배차 시스템을 물류업체에 적용한 결과를 제시하였다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.19 no.37
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• pp.111-115
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• 1996

This study is to decide each level ordering policy for deterministic demand in multilevel distribution system. The ordering policy is used the combinations of EOQ and LTC. The combinations of EOQ and LTC are 4 cases. Case 1 : Regional Warehouse∼EOQ, Central Warehouse∼EOQ. Case 2 : Regional Warehouse∼EOQ, Central Warehouse∼LTC. Case 3 : Regional Warehouse∼LTC, Central Warehouse∼EOQ. Case4 : Regional Warehouse∼LTC, Central Warehouse∼LTC. The criterion is to minimize total cost per year.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.10a
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• pp.84-85
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• 2012

Continuous oil price rising and the regulation of carbon emmission makes companies to have higher competitiveness. because of this trend, companies are trying to establish and manage efficient logistics system to improve customer service and reduce cost, so more competitive logistics complex is needed. To construct this kind of logistics complex, proper policy and logistics system for transportation is necessary. Especially, efficient operation through establishing system of logistics at the complex is very important for low cost and environmental friendly point of view. So this paper presents logistics network operation model for efficient transportation, especially approaches the problem with Multi-Phase.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.151-154
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• 2004

TV와 인터넷을 통한 전자상거래가 급증하면서 택배 및 배송시장이 급격하게 성장하고 있으나, 효율적이지 못한 물류체계로 물류비 부담이 높아지고 있어서 실질적인 이익은 시장증가에 미치지 못하고 있다. 현재 전자상거래의 쟁점은 소핑몰의 유형문제와 택배시스템/유통구조의 문제로서 다양한 해결책이 제시되고 있다. 본 연구는 직매입 형태로 마케팅과 직접 배송을 하는 회사를 대상으로 전자상거래의 특징인 촉진적 할인가격을 적용시키면서 기존의 중앙물류센터-지역물류센터-소비자 형태의 유통구조를 중앙물류센터-소비자로 변화시킨 지역물류센터의 일별재고량을 최소화 하는 모델을 제시하여 다단계 유통구조를 개선함으로써 회사의 이익을 증대시킬 수 있도록 하였다.

• Journal of the Korea Society of Computer and Information
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• v.6 no.4
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• pp.163-167
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• 2001

Many of these studies represent a large scale distribution network with a unified formulation by using defined symbols. This can be evaluated as a valuable progress toward accomplishing of a systematic approach the area of distribution network. Unfortunately. transportation problem and inventory policy applied in these studies have an assumption of using an unique supplier for calculating the transportation cost among each distribution echelon. This assumption can cause many problems such that transportation problem is assumed as linear problem, too many number of distribution center are allowed to operate and many more. In order to overcome above unrealistic problems, we developed an algorithm of responding to customers' demand under the refill allowance of same level supply as anew constructional method of inventory distribution network. When backorders are happened in regional distribution center, this algorithm allows transferring finished goods to customer directly from vicinal Regional distribution center instead of existing central distribution center for quick response.