• 한국경영과학회지
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• 제39권4호
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• pp.1-17
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• 2014

The functions of stocking and releasing in logistics center consist of three major procedure such as receiving, shipping and stock managements. Each process includes various sub-processes which are complicatedly connected with each other. Furthermore, lots of operators execute various tasks in the different sub-processes, simultaneously. It makes difficult to standardize, monitor, and analyze the processes. This paper proposed the quantitative methodology using process mining approach to discover and analyze receiving and shipping processes. For this purpose, the PDA operation log data is analyzed to build a realistic process model. The deduced model has been compared with official process model. In addition, task assignment and social networks analysises are carried out by utilizing process mining tools. Also, it has been proposed how to improve the processes with the analytical simulation model based on the results of process mining.

• 대한안전경영과학회지
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• 제16권3호
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• pp.369-376
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• 2014

The national Logistics Information system has been rapidly developed on account of the dramatic improvements in the military's logistics support system and supply support system, making a transition from manual work system to computerized work system. Supply level, however, does not reflect these changes in the overall logistics environment and still retains the state it was in the 1970s. This research uses the accumulated data from the equipment maintenance information system developed in the year 2009 to analyze RWT(Requisition Wait Time) and CWT (Customer Wait Time). The analysis estimated the realistic transportation and ordering time and led to the conclusion that the differentiated ASL operation system that considers demand level should be adopted instead of the uniform ASL employment system.

• 디지털산업정보학회논문지
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• 제8권4호
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• pp.193-203
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• 2012

This study analyzed regular transportation costs between port warehouses and processing plants and between processing plants and central distribution centers and further transportation costs relations according to empty transfer rates in each circulation by examining the distribution routes of imported grain including wheat, barley, corn, and soybean, namely port warehouses, processing plants, and central distribution centers. Based on the results, the study compared and reviewed the logistics transportation costs. The analysis results of the alternative model show that logistics operational costs could be considerably cut down by introducing a flexible vehicle transportation operational method, which is to change the vehicle loading parts for proper substitute transportation after unloading and transport them to other locations such as central distribution centers instead of returning empty, as an alternative to high operational costs deriving from empty vehicle operation in each circulation after unloading items in case of transportation of imported grain and processed items. The results allow for a more realistic approach to general problems with large-scale distribution network operation and provide a theoretical foundation to serve as a guide to establish policies for corporate operation of imported grain logistics systems.

• 한국건축시공학회지
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• 제11권5호
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• pp.468-481
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• 2011

This research presents a strategy and information system to manage the logistics of delivery ready mixed concrete (RMC) under the integrated environment of PMIS+RFID. PMIS is system tool and technique used in construction sectors to delivery information. Information that can be extracted electronically in real time is more valuable than data gathered and maintained manually. RFID technology can help to improve data accuracy through supply chains and by identifying products and objects at specific points through automatic identification. The objectives of these two implementations can be able to improve the efficiency of logistics management for RMC truck process, and to verify the technical and practical feasibility of PMIS+RFID application in construction industry. This may be realistic given the dynamics of daily activities on construction sites. This research is focused on examples on real world case study, applications and research theme related and connected to PMIS+RFID technology. It demonstrated that PMIS+RFID technology has been automatically implemented and has shown process information about the RMC truck and the overall status information about it, both quickly and accurately. As a result, the construction site where needs 300 $m^3$ pouring (50 RMC trucks) per day can be reduced total 250 minutes. Moreover, this time saving is related to the labour cost saving. From the case studies, RFID+PMIS system was proven in terms of effectiveness rather than current method.

• 디지털융복합연구
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• 제15권7호
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• pp.97-109
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• 2017

국내 자동차 보급률은 매년 3%대로 성장하고 있으나 꾸준한 가격인상으로 중고자동차를 구매하는 소비자가 늘고 있다. 그럼에도 불구하고 중고차 수출시장은 최근 주요국가의 수입 규제와 수출단지의 낙후된 환경 등으로 인해 하락세가 예상되고 있는 실정이다. 따라서 본 연구는 Fuzzy-AHP를 통해 새롭게 조성하는 인천항 중고자동차 물류단지에 대한 운영 요인을 도출하여 현실적인 운영방안을 제시하고자 하였다. Fuzzy-AHP는 각 계층 속성의 중요도를 산출하고 인간의 언어적인 모호함을 퍼지 수로 변환하는 방법론으로 현실적인 의사결정 방안을 제시할 수 있다. 운영요인 분석 결과 대요인에서는 물류단지비용요인이 가중치 0.306을 기록하여 가장 중요한 요인으로 도출되었으며 세부요인은 단지임대료, 단지 접근성, 물류부지규모 순으로 높게 나타났다. 선진화된 중고자동차 물류단지를 위해 경쟁력 있는 임대료 산정이 필요하며 임대료 지원 정책 실현 및 자유무역지구 지정을 고려해야한다 또한 해외 바이어를 위한 접근 인프라 확충 및 단지규모 확보가 필요하며 정부 차원의 전반적인 제도 개선 및 미래를 위한 IT 시스템의 도입이 필요하다.

• 대한안전경영과학회지
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• 제18권3호
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• pp.127-135
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• 2016

Korean automobile industrial is in a difficult situation because of more competitive global market and lower demand. Therefore, domestic as well as global automobile manufacturers are making greater efforts in cost reduction to strengthen the competitiveness. According to statistical data, logistics cost in domestic manufacturers is higher than advanced countries. In this study, we developed program to effectively manage standard time of procurement logistics, and confirm based on A-automobile factory data. For the purpose, we develop the system which is possible to manage standard time as well as calculate man-hour. Program is not just for calculating and managing standard man-hour, scenarios analysis function will be added to calculate benefit while introduce logistics automated equipment. In this study we propose scenario using AGV instead of electric motor while move component. In the scenario analysis, job constitution is changed, and then we use system to compare the result. We can confirm standard man-hour is reduced from 22.3M/H to 14.3M/H. In future research, it is necessary scenario analysis function, and develop algorithm with realistic constraint condition.

• 산업경영시스템학회지
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• 제23권58호
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• pp.59-69
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• 2000

Development of digital information and internet technology causes the changes of technology environments and companies, and the variety of customer needs has been dynamically changed in terms of integrating information system with customer satisfaction. Moreover a new logistics concept is needed through the sharing information between suppliers and consumers, which maximizes the level of customers service and its flexibility by changing functional-oriented to process-oriented. In other words, Supply Chain Management (SCM) is now considered as a key aspect of business, which controls the flows of information, funds, and goods in the supply chain. Rationalization of transport-delivery system will be one of the most important issues on logistics management to the domestic companies. The companies need the effective delivery system. Especially in the case of delivery system from distribution centers to customers or vendors, it might take a long time to control the delivery system manually because it would be hard to apply the automatic vehicle routing algorithm effectively considering all the practical constraints. Thus this study develops a heuristic algorithm of automatic vehicle delivery support system in terms of grouping by short ranges of vehicle movement utilizing postal coordinates, which satisfies a variety of realistic constraints and reduces controlling time of manual operations. In addition, the performance of the algorithm developed in this study is evaluated through the case study.

• 디지털융복합연구
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• 제11권3호
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• pp.181-187
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• 2013

공급자와 소비자간의 정보공유는 기능 중심에서 프로세스 중심이 되면서, 유연성과 고객 서비스를 극대화하기 위한 새로운 물류 개념을 요구하게 되었다. 다시 말하면 원부자재의 조달에서부터 생산을 거쳐 고객에게 판매되기까지의 전 과정에 걸친 개체간의 수요와 공급의 사슬관계를 의미하는 공급망 내에서 정보, 자금 그리고 물의 흐름을 관리 통제하는 공급사슬경영(SCM)이 사업의 핵심역량으로 인식되고 있다. 또한 국내 기업들의 수 배송 업무의 합리화는 국내 기업 물류관리의 가장 중요한 과제중의 하나로 부각되고 있다. 물류센터로부터 각 거래처로 물품을 배달하는 배송업무의 경우에는 기업의 물류정보시스템이 상류 중심의 데이터 체계로 구축되어왔기 때문에 물류관리 업무의 합리화에 활용할 수 있는 기초 데이터 부재와 현실적인 제약조건들을 고려한 효율적인 자동배차 알고리듬을 적용하지 못했기 때문에 배차담당자들의 수작업 조정시간이 장시간 소요되었다. 따라서 본 논문에서는 현실적인 다양한 제약조건을 만족하고, 수작업 조정시간이 대폭 줄이면서, 우편중심 좌표를 이용한 차량별 근거리 그룹핑으로 자동배차 지원시스템의 휴리스틱 알고리듬을 설계하도록 한다.

• Journal of the Korean Data and Information Science Society
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• 제21권2호
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• pp.355-361
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• 2010

This paper addresses a mathematical approach to decision making in a real-world material distribution situation. The problem is characterized by a low-volume and highly-varied mix of products, therefore there is a lot of material movement between the facilities. This study focuses especially on the transportation scheduler with a tool that can be used to quantitatively analyze the volume of material moved, the type of truck to be used, production schedules, and due dates. In this research, we have developed a mixed integer programming problem using the minimum cost, multiperiod, multi-commodity network flow approach that minimizes the overall material movement costs. The results suggest that the optimization approach provides a set of feasible solution routes with the objective of reducing the overall fleet cost.

• 디지털융복합연구
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• 제17권2호
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• pp.135-144
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• 2019

대형마트보다 저렴하고 편의성도 높은 창고형 매장에 대한 물류 중요성이 증대되고 있다. 하지만 창고형 매장의 통합 Depot 위치선정에 관한 연구는 부족한 실정이다. 이러한 측면에서 본 연구에서는 통합 Depot 위치선정을 위한 요인도출 및 가중치 산출, 대상지의 위치 우선순위 산정을 다기준 의사결정 방법인 AHP(Analytic Hierarchy Process)방법을 도입하여 계산하는 것을 연구의 목적으로 한다. 분석결과, 선정 요인별 중요도에서는 수배송 비용절감(0.198)이 가장 높게 나왔으며, 수배송 거리절감(0.168), 수배송 시간절감(0.149) 순으로 도출 되었다. 본 연구 결과는 Depot를 통합 운영 시 비용 절감과 효율성 증가를 수치화하여 실제 실무자들에게 보다 현실적인 기초자료를 제시할 수 있을 것으로 판단된다. 향후연구에서는 분석에 사용되는 요인의 추가작업을 통하여 분석모형을 정교화 할 필요가 있다.