• Title/Summary/Keyword: Demand chain management

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A Heuristic for the Operation Problem of the Vending Machine System (자판기 시스템 운영문제의 휴리스틱 해법 개발과 평가)

  • Park, Yang-Byung;Jang, Won-Jun;Park, Hae-Soo
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.34 no.4
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    • pp.152-161
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    • 2011
  • The operation of vending machine system presents a decision-making problem which consists of determining the product allocation to vending-machine storage compartments, replenishment intervals of vending machines, and vehicle routes, all of which have critical effects on system profit. Especially, it becomes more difficult to determine the operation variables optimally when demand for a product that is out-of-stock spills over to another product or is lost. In this paper, we propose a heuristic for solving the operation problem of the vending machine system and evaluate it by comparing with Yang's algorithm on various test problems with respect to system profit via a computer simulation. The results of computational experiments show a substantial profit increase of the proposed heuristic over Yang's algorithm. Sensitivity analysis indicates that some input variables impact the profit increase significantly.

Blockchain-based Poultry Information Management System Design and Implementation using Hyperledger Fabric

  • Ibrahim, Aliyu;Kamoliddin, Usmonov;Yoo, J.H.;Lim, Chang Gyoon;Jeong, Jung-Chae
    • Journal of Integrative Natural Science
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    • v.14 no.3
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    • pp.107-115
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    • 2021
  • The demand for traceability of meat and livestock supply chains is growing due to the high-profile incidents of hormonal contamination. E. coli, dioxin, BSE, and antibiotics have been recorded. In this paper, we present blockchain-based poultry information management system design and implementation using Hyperledger Fabric. The proposed system offers accurate, decentralized, immutable and consensus process that promote trust and transparency between stakeholders. The main tasks of the system include the recording of the information associated with poultry rearing (from a hatchery to a farm), status report of the farm activities on a monthly basis. The system can track movement of docks through the supply chain until delivery to the final consumer through the retail outlet. The ability to trace the source of livestock product through all the stages of rearing/production, processing and distribution is essential for ensuring food safety as recall of contaminated product can easily be done thereby increasing consumer confidence.

A Study on the SCM Capability Modeling and Process Improvement in Small Venture Firms (중소·벤처기업의 SCM역량 모델링과 프로세스 개선 방안에 관한 연구)

  • Lee, Seolbin;Park, Jugyeong
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.13 no.2
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    • pp.115-123
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    • 2018
  • This study is empirically intended to put forward the modeling and process improvement measures for the SCM capability in small venture firms. The findings are summarized as follows. There were strategic alliance, technological development and centralization in the modeling of strategic planning for supply chain, not the least of which is strategic alliance, followed by centralization and technological development. There were routing scheduling, network integration and third party logistics outsourcing in decision making, not the least of which was network integration. There were customer service management, productivity management and quality management in management control, not the least of which was quality management. And there were order management choice, pricing demand, shipment delivery and customer management in transaction support system, not the least of which was order management choice. As for the above-mentioned findings, to maximize the SCM capability and operate the optimized process in small venture firms, the existing strategic alliances can optimize the quality management and stabilize the transaction support system through the network sharing and integration from the perspective of relevant organizational members' capability and process improvement. And the strategic linkage between firms can maximize the integrated capability of information system beyond the simple exchange relation between electronic data, achieving a differentiated competitive advantage. Consequently, the systematization and centralization for the maximization of SCM capability, including the infrastructure construction based on the system compatibility and reliability for information integration, should be preceded before the modeling of the integrated capability for optimum supply chain and the best process management in the smart era.

Performance Analysis of Dynamic Spectrum Allocation in Heterogeneous Wireless Networks

  • Ha, Jeoung-Lak;Kim, Jin-Up;Kim, Sang-Ha
    • ETRI Journal
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    • v.32 no.2
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    • pp.292-301
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    • 2010
  • Increasing convergence among heterogeneous radio networks is expected to be a key feature of future ubiquitous services. The convergence of radio networks in combination with dynamic spectrum allocation (DSA) could be a beneficial means to solve the growing demand for radio spectrum. DSA might enhance the spectrum utilization of involved radio networks to comply with user requirements for high-quality multimedia services. This paper proposes a simple spectrum allocation algorithm and presents an analytical model of dynamic spectrum resource allocation between two networks using a 4-D Markov chain. We argue that there may exist a break-even point for choosing whether or not to adopt DSA in a system. We point out certain circumstances where DSA is not a viable alternative. We also discuss the performance of DSA against the degree of resource sharing using the proposed analytical model and simulations. The presented analytical model is not restricted to DSA, and can be applied to a general resource sharing study.

New Approaches for IT Human Resource Development: Korean Cases and the Applicability to Other Countries

  • Hwang, Gyu-Hee;Park, SeonHye
    • Asian Journal of Innovation and Policy
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    • v.3 no.2
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    • pp.154-171
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    • 2014
  • This article aims to examine the achievement and limitation of adaptation of supply chain management (SCM) to IT human resource development (HRD) in Korea and to derive the implication of the Korean experience to other countries. In late 1990s, the IT New Deal Policy and the quantitative expansion of IT HR were introduced. Since mid-2000s, there has been much innovation in IT products as well as increased demand of highly qualified IT experts. The SCM in IT HRD was introduced in 2004 and continuously developed more. Since the late 2000s, IT convergence expanded to traditional industries and the new IT-based-industries were created in Korea. In this regard, Korea established the Seoul Accord as an international IT engineering education accreditation system in 2008. In response to the paradigm change, in 2011, the Korean government developed TOPCIT, which is a kind of competency test for evaluating IT competency.

Estimation of Economical Efficiency in Multi-Echelon Inventory System through Coordination of Inventory Replenishment Period (재고보충주기의 조정을 통한 다단계 재고시스템의 경제성 평가)

  • Kim, Myeong-Hun;Kim, Byeong-Gon
    • Proceedings of the Korea Society of Information Technology Applications Conference
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    • 2007.05a
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    • pp.198-208
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    • 2007
  • Recently business enterprises have forced to face in fierce competition in today's global markets due to the short life cycles of products and the higher expectation of customers. Together with continuing advances in communications and transportation technologies, these environments have motivated the continuous evolution of the supply chain and the management techniques. This paper consider three-echelon inventory system which consist of one manufacturer, one distributor and N retailers for a single product under assumption of constant demand. This paper propose the inventory replenishment period using heuristic method and order policy through coordination of inventory replenishment period. The simulation results show that decrease the total cost of the three-echelon inventory system.

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Decision Issues on Part Supply in Build-to-Order Manufacturing Systems (주문생산방식 제조시스템에서 부품공급에 관한 의사결정 이슈)

  • Choi, Ki-Seok
    • Journal of Korean Institute of Industrial Engineers
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    • v.39 no.1
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    • pp.78-81
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    • 2013
  • In Build-to-Order manufacturing systems, products are usually manufactured by a pull system. The manufacturers order only what they need when it is needed. The suppliers are expected to deliver parts as much as needed. When the part demand fluctuates significantly, this places lots of challenges on the suppliers. In this letter, we explore the decision issues regarding part supplies for Build-to-Order manufacturing systems, especially in the auto industry, and suggest how to address them in order to make the manufacturing systems work more efficiently.

The Empirical Analysis on Determinants of 4PL Logistics in Korean Firms (한국기업의 제4자물류 결정요인에 관한 실태분석)

  • Song, Gye-Eui
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.25
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    • pp.189-210
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    • 2005
  • The application of 4PL could allow for the efficiency of many logistics operations to be greatly increased, for costs to be reduced, and for operations to become more responsive to consumer demand. It is also possible that higher services level and lower cost products could become available as a consequence. However, in order to implementing 4PL actually it is very important to be met to fundamental determinants of 4PL such as formation of logistics experts group, providing of total logistics service, capacity of IT, implementation of e-Business model, capacity of logistics consulting, higher logistics service level, logistics cost reduction, re-engineering of logistics process, focus of core competence etc.

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A Study on Collaborative Demand Planning for Effective Supply Chain Management (SCM 구축을 위한 협업적 수요예측 모형 개발 - 통신장비 제조산업의 협업 수요예측 실제 사례 모형 연구 -)

  • Kwon, Jae-Hyun;Park, Sang-Min;Nam, Ho-Ki
    • IE interfaces
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    • v.17 no.1
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    • pp.84-92
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    • 2004
  • We have discussed the importance of collaborative forecasting and the difficulties that can arise during its implementation. We have also proposed the detail process of collaborative forecasting and the system requirement on each step of the process so that the proposed detail process can be easily applied to real life scenario. Lastly, we have talked about a case study of a telecommunication equipment manufacturer that has implemented the proposed collaborative forecasting process that verify the feasibility of the process.

Materials Flow Analysis of Metallic Cobalt and Its Powder in Korea

  • Hon, Hyun Seon;Kang, Lee-Seung;Kang, Hong-Yoon;Suk, Han-Gil
    • Journal of Powder Materials
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    • v.21 no.3
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    • pp.235-240
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    • 2014
  • The basis of the cobalt demand analysis by use was established via the investigation and analysis of the cobalt materials flow, and the overall cobalt metal material and parts industry structure in Korea was examined to determine the cobalt material flow. The markets of the cobalt material for machinery were studied, including their interrelations, via market and study trends, and relevant plans were examined. The results of the study indicated that the advanced core technology for advanced industry and technology-intensive industry development is required to structurally innovate the parts materials and basic materials industries and to upgrade the catch-up industry structure to the new frontier structure.