• Journal of Korea Society of Industrial Information Systems
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• v.22 no.2
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• pp.79-89
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• 2017

The Optimization of a Closed-Loop Supply Chain (CLSC) Model Using an Adaptive Hybrid Genetic Algorithm (AHGA) Approach is Considered in this Paper. With Forward and Reverse Logistics as an Integrated Logistics Concept, The CLSC Model is Consisted of Various Facilities Such as Part Supplier, Product Manufacturer, Collection Center, Recovery Center, etc. A Mathematical Model and the AHGA Approach are Used for Representing and Implementing the CLSC Model, Respectively. Several Conventional Approaches Including the AHGA Approach are Used for Comparing their Performances in Numerical Experiment.

• Journal of the Korea Society for Simulation
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• v.15 no.3
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• pp.39-47
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• 2006

In most of supply chain planning practices, the estimated demands, which are forecasted for each individual period in a forecasting window, are regarded as deterministic. But, in reality, the forecasted demands for the periods of a given horizon are stochastically distributed. Instead of using a safety stock, this study considers a direct control of service level by choosing the demand used in planning from the distributed forecasted demand values for the corresponding period. Using the demand quantile and echelon stock concept, we propose a simple but efficient heuristic algorithm for multi-echelon serial systems under service level constraints. Through a comprehensive simulation study, the proposed algorithm was shown to be very accurate compared with the optimal solutions.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.385-388
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• 2013

물류 고도화를 통한 기업 생산성 확보 및 생존 경쟁력 강화를 위해 기존의 공급망 관리(SCM) 기술에 RFID 기술을 융합함으로써 물품자동 인식, 물류정보 교환 및 추적 등의 지능화 서비스를 온라인상에서 실시간으로 제공할 수 있는 기술이 적용되고 있다. 하지만 물류정보 동기화 기술 개발 측면에서는 물류정보의 단순 가시화 시스템 개발 수준에 머물고 있는 것이 현실이고, 본격적인 확산을 위해 수집된 데이터 오류 검출 및 보정이라는 물류정보 동기화 기술 개발로 물류 시스템 운용 비용을 절감할 수 있다면 그 파급 효과가 매우 클 것이다. 지금까지는 RFID 인프라 기술 개발에 집중해 왔기에 물류정보 동기화 기술은 아직 초기 연구 단계에 머무르고 있다. 본 논문은 RFID 기반 공급망 상에서 발생할 수 있는 물류정보 동기 오류를 검출하고 보정할 수 있는 물류정보 동기화 알고리즘을 설계하고, 향후 공급망의 변화 및 확장 등의 이유로 알고리즘을 효율적으로 수정 보완할 수 있는 비즈니스 룰엔진 기반의 아키텍처를 구현하여 글로벌 물류 기업에 적용하고, 그 결과를 분석하여 물류정보 동기화 알고리즘과 구현 아키텍처의 효율성을 증명하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.111-114
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• 2020

이 연구는 해운산업의 해운물류통합에 적용된 ICT기술들의 적용현황을 문헌연구를 통해 자료를 수집하고 정리하여 요약하여 conceptual model을 개발하고 전체적인 로드맵을 제시하였다.

• Journal of Digital Convergence
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• v.14 no.8
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• pp.211-221
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• 2016

The rapid trends toward outsourcing and collaboration have created complex multi-tier supply chains for construction and engineering industries. Working with suppliers and sub-suppliers requires continuous integration activities in order to maximize the performances of the entire supply chain. The purpose of this study is to identify the factors influencing the performances and long-term business relationship of second-tier suppliers in directed sourcing environment. This study proposes the asset specificity, trust, information-sharing and collaboration, as antecedents variables, and collected the survey responses from the second-tier suppliers in rebar manufacturing works. The statistical results indicate that the asset specificity, trust, information-sharing and collaboration have significant influences on the long-term business relationship of rebar manufacturing second-tier suppliers, but trust has no impact on the performances of second-tier suppliers at 5% significance level. Practical implications are also discussed.

• Proceedings of the KIEE Conference
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• 2001.11b
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• pp.226-227
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• 2001

일반거주지역의 초고속 광가입자망 구축을 위해 B-PON(Broadband Passive optical network)시스템과 이를 위한 급전방안으로 공유급전이 고려되고 있다. 한곳의 Power-Node가 최대 32개의 ONU에 전력을 공급하기 위해서는 고 전위의 구동 source가 필요하게 된다. 고압실현을 위하여 검토되는 회로는 범용으로 사용되는 linear 방식보다는 SMPS(Switching Mode Power Supply)방식의 소형경량화의 회로를 채택하며, 고 용량화에 수반되는 역률 문제를 보상하고, 고효율을 실현하여 전체시스템의 전력밀도의 극대화를 이루었다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2008.06a
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• pp.285-289
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• 2008

본 연구는 급격한 인터넷 환경의 발전으로 인하여 치열한 경쟁 환경 속에서 공급망 관리(SCM)와 고객 관계 관리(CRM)를 적용한 물류관리 시스템과 온라인 판매 시스템을 효과적으로 통합하여 웹2.0(플렉스)기반 시스템으로 구현하여 다른 어플리케이션과의 UI와 성능, 보안성, 실시간처리 및 시스템에 차별화하여 중점을 두고 프로토타입으로 구현해보았다.

• Korean Chemical Engineering Research
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• v.46 no.4
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• pp.792-798
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• 2008

Supply chain management (SCM) has been drawn increasing attention in industries and academia. The attention is mainly due to a need to integrate the multiple activities in a process network from the overall perspective under the constantly varying economic environment. While many researchers have been addressing various issues of SCM, there is not much research explicitly handling the overall dynamics of supply chain entities from PSE literature. In this two-part series paper, it is investigated how the overall supply chain processing times vary in response to the variation of individual entities using Monte Carlo simulation. Instead of figuring out the operation levels of individual entities, the overall operation time called TAT(Turn-Around-Time) is proposed as a performance indicator. An example of 7 entity-supply chain is presented to illustrate the proposed methodology.

• Economic and Environmental Geology
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• v.56 no.2
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• pp.155-166
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• 2023

Through COVID-19, the importance of supply chain management of raw material minerals has been maximized. In particular, supply chain management is important for rare metals, which are difficult to manage demand and supply, in order to secure raw materials for the parts and materials industry that Korea is actively promoting. In this study, a system was established and evaluated to select Critical minerals that need to respond to Korea's industrial structure and global risks by quantifying tangible and intangible risk factors. Global Supply Concentration, Supplying country risk, Policy Social Environment Regulation, Domestic Import Instability, Risk responsiveness, Market Scale, Demand Fluctuation and Economic Importance were evaluated as evaluation indicators. The degree of risk and risk impact were quantitatively measured using the criticality matrix-criticality level. After evaluating 40 types of minerals used in domestic new growth businesses, 15 types of Critical minerals(Li, Pt, Co, V, REE, Mg, Mo, Cr, Ti, W, C, Ni, Al, Mn, Si) in Korea were selected. The results are expected to be used to establish policies to strengthen resource security and to make decisions to form a company's raw material portfolio.

• The KIPS Transactions:PartD
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• v.19D no.3
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• pp.257-262
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• 2012

The aim of this study is to present the importance of Risk Management and Risk Classification System in Supply Chain to cope with the rapidly changing distribution environment flexibly through the cooperation between a shipper and a distribution company. First of all, we considered existing studies related to the risks of Supply Chain Risk and analyzed 47 different risk factors by 18 kinds of risk causing factors. Second, we collected opinions of corporation specialist group based on the analyzed risk factors and then classified the risk factors into three categories and ten sub-categories. Third, we conducted a survey targeting shipping companies and distribution companies about classified risk and then verified the validity of Supply Chain Risk Classification using verification techniques such as Confirmatory Factor Analysis, Concentration Validity and Distinction Validity. Finally, we suggest some implications based on the verification results.