• Journal of the Korea Society of Computer and Information
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• v.14 no.7
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• pp.161-168
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• 2009

In this paper, we studied about an consolidated transportation model to transport EOL (end-of-life) electronic household appliances for recycling in South Korea. The objective is to minimize the total traveling distance of the vehicles transporting EOL electronic household appliances collected by local authorities and major manufacturers' distribution centers to assigned R/C(recycling center) in South Korea. Current reverse logistics for recycling EOL electronic household appliances is operated by local authorities and major manufacturers individually, and it is inefficient for the following reasons: excessive traveling distance, transportation cost, low truck capacity utilization, and so on. The presented model is developed to solve this problem. We apply a integer programming to solve this problem and present computational results using actual field data.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10a
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• pp.298-300
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• 2004

휴대 단말기 보유율의 급격한 증가는 새롭고 다양한 형태의 무선 통신 기술의 개발을 촉진시키는 계기가 되었으며, 특히 국내의 경우 이동통신 시장의 경제적이나 양적으로 급속한 성장을 이루어 사회 전반에 걸쳐서 새로운 가치를 생산해 내어 생활 모습을 크게 바꾸어 놓고 있다 따라서 이러한 환경의 변화는 사용자 중심의 다양한 서비스를 제공할 수 있는 차세대 무선 통신 기술의 연구가 필요한 실정이다. 따라서 본 논문에서는 물류 관리에 적용을 고려하여 RF Tag 인증 프로토콜을 제안하고자 한다. 제안된 방식의 경우 기존 RF Tag 인증 연구에서 보다 하드웨어적 경량성을 제공할 뿐만 아니라 물류적용을 위한 식별 회수에 제한 둠으로 해서 보다 안전하고 효율적인 물류 관리 서비스를 적용할 수 있는 방식이다

• Journal of the Korea Society for Simulation
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• v.15 no.2
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• pp.13-21
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• 2006

Due to the exhaustion of resources and increasing concerns about the environment, reverse logistics has become a critical issue in recent years. We discuss the conventional logistics operations and the reverse logistics operations in the automotive industry. The traditional supply chain (TSC) and the reverse supply chain (RSC) models are developed to compare performance between two systems. In addition, results of the simulation models are discussed in respect to total costs, inventory levels and stock-outs to analyze the effects of introducing of reverse logistics system.

• International Commerce and Information Review
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• v.16 no.4
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• pp.171-190
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• 2014

A short consumption cycle caused by the technological development and the diversification of customer lead to both the dynamic growth of the industry and the waste recycling issue at the same time. Including Korea, the situation is particularly worrisome in some countries, such as India and China, where acute environmental hazards have resulted from a combination of a lack of recycling centers' capacity and the domination of a large backyard recycling sector. A study about to maximize the current recycling center efficiency with minimal changes is required. In this study, we suggest the optimal location selection method for the recycling center based on the well-known reverse logistics cost minimization model. An actual recycling data about a specific electronic equipment and region in Korea are used for the verification of the method suggested.

• Journal of Korea Society of Industrial Information Systems
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• v.19 no.5
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• pp.81-90
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• 2014

It is an element certainly required for the cost reduction of a company that forward and reverse logistics chain are unified and constitutes a resource closed-loop supply chain (CLSC). In this study, the inventory control which unifies inventory of distribution centers (DCs) of forward logistics and processing center of reverse logistics in the CLSC environment is proposed. The inventory system model for newly-constructed CLSC considers the JIT(Just-In-Time) delivery from the processing center to the manufacturer, including the making of decisions on whether to wait for the arrival of end-of-life products or to back-order necessary products for manufacturer when the supply of end-of-life products at the processing center via the returning center is insufficient for the demands of the manufacturers. The validity of the proposed model was verified using the genetic algorithm (GA). In order that a parameter might investigate the effect which it has on a solution, the simulation was carried out for priGA(priority-based GA) on three kinds of parameter conditions. Moreover, mhGA(modified hybrid GA) to which a parameter is adjusted for every Study on Reducing Logistics Costs and Inventory Control System according to facilities integration in the Closed-Loop Supply Chain Environment generation, the simulation was carried out to a four-kind numerical example.

• Journal of Korea Port Economic Association
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• v.33 no.4
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• pp.59-72
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• 2017

The purpose of this study is to analyze and compare the perceived job satisfaction of logistics company employees and students majoring in logistics who expect to engage in logistics occupations after graduation, and to suggest its implications in improving logistics job satisfaction. Based on previous studies on job satisfaction for logistics and other industries, the pertinent factors to logistics job satisfaction were identified, and a survey was conducted for logistics company employees and students majoring in logistics. Additionally, frequency analysis, reliability analysis, and t-test were performed to compare the differences in logistics job satisfaction. As a result of comparing the perceptions differences in job satisfaction between logistics company employees and students majoring in logistics, each pair of the following were significantly different: personal achievement, social achievement, job prospect, and economic satisfaction. However, there was no meaningful difference in job security and recognition from others.

• Corrugated packaging logistics
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• s.91
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• pp.78-96
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• 2010

열설비에서 회수되는 고온의 응축수를 고온수용 급수펌프를 이용하여 직접 급수시키므로 응축수탱크 및 보충수탱크에서 발생되는 재증발 증기를 Steam ejector를 이용, 흡입하여 중압으로 열사용처로 다시보내 15%이상의 에너지 절감효과 및 연료절감 효과를 볼수 있도록 하는 설비를 개발하여 소개하고자 한다.

• Journal of Korea Port Economic Association
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• v.25 no.4
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• pp.21-44
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• 2009

This study aims to understand the conditions for using logistics outsourcing of Korean enterprises, present existing problems, examine factors affecting utility, and analyze the pattern of logistics outsourcing based on contract term, and to ultimately contribute to enhancing competitiveness of logistics enterprises. Through the literature survey 8 factors were identified as three broad factors of corporate strategy, corporate characteristics, and environment. Factor analysis was conducted on the bases of 155 collected data among 400 distributions for 2 months from April to May in 2008. From the result of analysis, the implication and finding can be summarized into three aspects. Firstly, Korean companies value factors relative to corporate strategies as motivating factors for logistics outsourcing. Secondly, Korean companies consider logistics outsourcing depending on how to handle customers' demands and the severity of competition. Thirdly, it was found that product and organization characteristics are perceived as more important when contract term with logistics business is longer. The implications can be observed into two aspects. Firstly once the logistics outsourcing between manufacturers and logistics companies are determined, it was verified that mutual agreement, particular contracts and periodic communications can increase the outcome. Secondly the logistics outsourcing appeared to be different depending on the level of entering to foreign market and resulted in higher performance as well.

• Journal of Korea Multimedia Society
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• v.12 no.11
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• pp.1671-1679
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• 2009

The existing subjects of supply chain management, which link business firms to customers, have focused on forward logistics such as acquisition of low and subsidiary parts, manufacturing, distribution and sales. Consequently, it is emphasized that supply chain management has to be a sustainable business activity. Nevertheless, capabilities of reverse supply chain management for domestic companies are still relatively limited compared to advanced foreign companies. For this reason, this study aims to develop the service platform, which provides information on return, retrieval, abolish and recycling using RFID, includes information on packing, placement, loading and unloading and transportation of the goods. In order to achieve the purpose of this study, the research previous studies and analyze achieved diverse cases on reverse logistics, review the present state, and propose service platform application to manage reverse supply chain which will be applied.

• Journal of Korea Society of Industrial Information Systems
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• v.21 no.4
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• pp.31-41
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• 2016

This paper is to evaluate the performance of a proposed hybrid genetic algorithm (pro-HGA) approach using closed-loop supply chain (CLSC) model. The proposed CLSC model is a integrated supply chain network model both with forward logistics and reverse logistics. In the proposed CLSC model, the reuse, resale and waste disposal using the returned products are taken into consideration. For implementing the proposed CLSC model, two conventional approaches and the pro-HGA are used in numerical experiment and their performances are compared with each other using various measures of performance. The experimental results show that the pro-HGA approach is more efficient in locating optimal solution than the other competing approaches.