• 제목/요약/키워드: Supply Function Model

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Sensitivity Analysis for Joint Pricing and Lot-sizing Model with Price Dependent Demand under Day terms Supplier Credit in a Two-stage Supply Chain

  • Shinn, Seong-Whan
    • International Journal of Advanced Culture Technology
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    • 제8권2호
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    • pp.270-276
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    • 2020
  • In this paper, we analyze the buyer's joint pricing and lot-sizing model in a two-stage supply chain consisting of the supplier, the buyer and the customer. It is assumed that the supplier will permit a certain fixed period for settling the amount the buyer owes to him for the items supplied in order to stimulate the demand for the product. Generally, credit transactions would have a positive effect to the buyer. The availability of credit transactions from the supplier effectively reduces the cost of holding stocks for the buyer and therefore, the buyer has a lot of price options to choose his sales price for a customer in anticipation of increased the customer's demand and, as a result, it will appear to increase the buyer's inventory levels. On the other hand, in the case of decaying products in which their utility decay over time, the decaying rate with time may be expected to reduce inventory levels. In this regard, we need to analyze how much the length of credit period and the decaying rate affect the buyer's pricing and lot-sizing policy. For the analysis, we consider the situation where the customer's demand is represented as a linearly decreasing function of the buyer's sales price. From this perspective, we formulate the buyer's annual net profit and analyze the effect of the length of credit period and decaying rate of the product on the buyer's inventory policy numerically.

소규모 댐의 저수관리 시스템 개발 (Development of Storage Management System for Small Dams)

  • 김필식;김선주
    • 한국농공학회논문집
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    • 제47권3호
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    • pp.15-25
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    • 2005
  • Ninety tow percent of over 1,800 gate controlled dams in Korea are classified as small dams. The primary purpose of these small dams is to supply irrigation water. Therefore, while large dams can store as much as 80 percent of precipitation and thus are efficient to control flood, small dams are often lack of flood control function resulting in increased susceptibility drought and flood events. The purpose of this study is to develope a storage management model for irrigation dams occupying the largest portion of small dams. The proposed Storage Management Model (STMM) can be applied to the Seongju dam for efficient management. Besides, the operation standard is capable of analyzing additional available water, considering water demand and supply conditions of watershed realistically. And the model can improve the flood control capacity and water utilization efficiency by the flexible operation of storage space. Consequently, if the small dams are managed by the proposed Storage management model, it is possible to maximize water resources securance and minimize drought and flood damages.

Iterative search for a combined pricing and (S-1,S) inventory policy in a two-echelon supply chain with lost sales allowed

  • Sung Chang Sup;Park Sun Hoo
    • 한국경영과학회:학술대회논문집
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    • 한국경영과학회/대한산업공학회 2003년도 춘계공동학술대회
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    • pp.8-13
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    • 2003
  • This paper considers a continuous-review two-echelon inventory control problem with one-to-one replenishment policy incorporated and with lost sales allowed where demand arrives In a stationary Poisson process The problem Is formulated using METRIC-approximation in a combined approach of pricing and (S-1.S) Inventory policy, for which an iterative solution algorithm is derived with respect to the corresponding one-warehouse multi-retailor supply chain. Specifically, decisions on retail pricing and warehouse inventory policies are made in integration to maximize total profit in the supply chain. The objective function of the model consists of sub-functions of revenue and cost (holding cost and penalty cost). To test the effectiveness and efficiency of the proposed algorithm, numerical experiments are performed The computational results show that the proposed algorithm is efficient and derives quite good decisions

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가능납기 산정을 위한 ATP 알고리즘 연구 (Study on Available-To-Promise Algorithm for Determining Available Delivery Time -)

  • 박재현;양광모;김건호
    • 대한안전경영과학회지
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    • 제3권4호
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    • pp.181-191
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    • 2001
  • Integrated Supply Chain Management is a important subject for all enterprise activities as include logistics/sales, transfer and storage, manufacturing, purchasing of materials. A recent customer wants to receive high level service of all parts as Qualify, Delivery, Cost and Product. Therefore, Enterprise effort to supply for customers needs use some techniques like Data Mining, POS, MIS. Inventory and Logistics cost is the highest expense of all cost from first supplier to final customer on supply routine. So, SCM's basic purpose is reduce to that cost. So that this paper explain necessary, background, concept of SCM, analyze several using methodology and function of main SCM solution, after propose to ATP model include arithmetic procedure, functions, input data for determines available due date.

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운임할인이 있는 생산자-구매자 공급망에서의 생산 및 출하량 결정 (Production and Shipment Lot Sizing in a Vendor-Buyer Supply Chain with Freight Cost Discounts)

  • 김창현
    • 한국경영과학회지
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    • 제34권4호
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    • pp.139-151
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    • 2009
  • Based on single-vendor single-buyer integrated production-inventory problem, a model considering freight costs discounts is suggested when the cargo capacity is constrained. With the cost function formulated, several properties of the model are derived and analyzed. An efficient algorithm to find solutions such as shipment lot size, number of shipments and number of full truckloads using properties derived is suggested. Numerical results are provided to illustrate the proposed solution procedures and to provide additional insights.

Critical Assessment of Programme-Based Conflict Resolution Model Applied to Multiple Stakeholders Within The Context of Industrialized Building Production and Life Cycle Supply Chain System

  • Tanaka, Koji
    • 국제학술발표논문집
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    • The 9th International Conference on Construction Engineering and Project Management
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    • pp.551-562
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    • 2022
  • The building production system has been analysed by the dichotomy "employer-contractor" relationship, which failed to take into account of the role and function of multiple stakeholders within the life-cycle supply chain. This is further observed in the current conflict resolution model, which, in my argument, struggles to contribute to industrialize the building production and achieve better efficiency and effectiveness as expected. The purpose of this paper is to critically assess the issues of current programme-based conflict resolution model, and discuss alternative models how they can be modelled and applied to the construction projects. The conclusions of findings are; First, the current model is framed around the contracts and dispute resolutions based on the legal concept of "claimant and respondent" where one party(s) advances a claim once and the other(s) objects, as such it fails to reflect the nature of construction projects where multiple stakeholders are involved concurrently and for a long period of life-cycle of buildings. Second, an alternative is "Six-stakeholders model" which represents the multiple stakeholders and clarifies the flow of obligation-liability-monetary relationships among participants for a long period of life-cycle of buildings. Further, with reference to both historical and recent cases, a reflection and insight into pros and cons of programming method is added, especially as to why this method is considered to have become a mandate of the modern construction management, and how academics and practitioners should deal with it more cautiously and prudently.

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An Experimental Study of Ventilation Effectiveness in Mechanical Ventilation systems using a Tracer Gas Method

  • Lee, Jae keun;Kang, Tae-Wook;Lee, Kam-Gyu;Cho, Min-Chul;Shin, Jin-Hyuk;Kim, Seong-Chan;Koo, Jeong-Hwan;Lee, Jong ho
    • Journal of Mechanical Science and Technology
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    • 제14권11호
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    • pp.1286-1295
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    • 2000
  • The ventilation effectiveness is evaluated as a function of air exchange rate and supply / extract locations in a simplified model chamber using a tracer gas technique of CO$_2$ gas injected into a supply duct. Ventilation systems consist of supply and extract fans, a CO$_2$gas generator, a CO$_2$gas analyzer and a test chamber. The ventilation effectiveness is evaluated using a step-down method based on ASTM Standard E741-83. The room mean age of the model chamber is decreased with increasing air exchange rate fanged from 6to 10 air changes per hour. The ventilation effectiveness of the mechanical inlet/natural extract system is better than that of the mechanical extract system.

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AHP 기법을 이용한 우리나라 수산업관측사업의 추진방향에 관한 연구 (A Study on Development Strategies of the Korean Fisheries Outlook Project based on AHP)

  • 남종오;노승국
    • 수산경영론집
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    • 제41권1호
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    • pp.25-52
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    • 2010
  • The purpose of this paper is to suggest major strategies and necessary new projects for the medium- and long-term development of the Korean Fisheries Outlook Project. To suggest the Korean Fisheries Outlook Center with the above purpose, this paper employs Analytic Hierarchy Process analysis based on surveys obtained by special groups related with the KFOP. The survey is broadly composed of two goals; the medium- and long-term development directions and setting up of new furtherance projects. Each goal has upper and lower strategies respectively. The first goal, the medium- and long-term development directions, has four factors as upper strategies. The upper strategies are composed of accuracy, efficiency, timeliness, and political effectiveness of the fisheries outlook information. In addition, each upper strategy has three lower strategies respectively. For example, accuracy of the fisheries outlook information includes strength of data collection function, strength of satellite photography function, and strength of data analysis function. The second goal, setting up of new furtherance projects, has three factors as upper strategies. The upper strategies consist of accuracy promotion of outlook information using high-technique, field expansion of outlook species, and strength of analyzing function on oversea fisheries information. Each upper strategy has three lower strategies respectively. For instant, accuracy promotion of outlook information using high-technique has strength of information analysis function covered from production to consumption, strength of satellite information function, and structure of forecasting model on demand and supply by outlook species. The above upper and lower strategies were analytically drawn out through insightful interviews with special groups such as officials of the government, presidents of the producer and distributor groups, and researchers of the Korea Maritime Institute and other research institutes. As a result of AHP analysis, first, priorities of upper strategies with the medium- and long-term development directions are analyzed as accuracy, timeliness, political effectiveness, and efficiency in order. Also, priorities of all lower strategies reflecting priorities of upper strategies are examined as includes strength of data collection function on the fisheries outlook information, delivery of rapid information on outlook products for all people interested, strength of data analysis function on fisheries outlook information, strength of consumption outlook function on fish products, and strength of early warning system for domestic fish products in order. Second, priorities of upper strategies with the setting up of new furtherance projects are analyzed as accuracy promotion of outlook information using high-technique, field expansion of outlook species, and strength of analysis function on oversea fisheries information in order. In addition, priorities of all lower strategies reflecting priorities of upper strategies are examined as building up of forecasting model on demand and supply by outlook species, strength of information analysis function covering all steps from production to consumption, expansion of consumption outlook for consumers, strength of movement analysis function of oversea farming industry, and outlook expansion of farming species.

펄스형 호지킨-혁슬리 신경세포 모델의 집적회로 구현 및 분석 (Integrated Circuit Implementation and Analysis of a Pulse-type Hodgkin-Huxley Neuron Model)

  • 권보민;정진우;박주홍;이제원;박용수;송한정
    • 전자공학회논문지 IE
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    • 제46권1호
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    • pp.16-22
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    • 2009
  • 펄스형 신경세포를 구현하기 위하여 호지킨-헉슬리 모델을 참조하여 $0.5{\mu}m$ CMOS 공정을 이용한 집적회로를 설계하고 칩 제작하였다. 펄스형 단위 신경세포는 취합기능을 갖는 입력단과 임계값이상에서 신호발생을 일으키는 펄스생성회로로 구성된다. 입력단을 입력전류신호를 취합하는 범프회로, 펄스생성회로는 몇 개의 트랜스콘덕터와 커패시터 전하공급기능을 갖는 부성저항회로로 이루어진다 SPICE 모의실험결과 임계신호전류 70 nA이상에서 펄스생성이 일어남을 확인하였고, 제작된 칩을 5V 조건하에서 측정하여 모의실험결과와 비교분석하였다.

밀양 깻잎 농업의 총소득 극대화를 위한 적정 생산 규모 전망 (Prediction of Optimal Production Level for Maximizing Total Profit in Miryang Sesame Leaf Cultivation)

  • 조재환;정원호
    • 한국산학기술학회논문지
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    • 제22권1호
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    • pp.313-320
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    • 2021
  • 본 연구는 경남 밀양 깻잎 농업의 수급 및 가격 모형을 개발하고 정책 실험을 통해 밀양 깻잎 생산 농가의 총 소득을 극대화하는 적정 생산 규모를 전망한다. 분석 자료는 밀양 깻잎 농업의 총 소득과 관련된 22개년 시계열 자료(1996~2017년)가 이용되었다. 분석 방법은 수요 함수와 평균 비용 함수 추정을 통하여 적정 생산량과 가격을 산출하고 이를 통해 적정 소득을 도출하였다. 또한, 시나리오 분석을 통하여 2030년까지 예상되는 밀양 깻잎 최적 생산량과 이에 해당하는 판매 가격, 총 수입, 총 비용, 총 소득을 전망하였다. 밀양 깻잎 생산 농가 전체를 대상으로 총 소득을 극대화하기 위해서는 2017년에 7천 톤 규모인 밀양 깻잎 생산량을 2030년까지 10~12.5천 톤으로 증가시킬 필요가 있다. 이 경우 밀양 깻잎 농업에 귀속되는 총 소득은 133~213억 원 수준으로 전망된다. 앞으로 밀양 깻잎 생산자 단체는 본 연구에서 제시한 적정 생산 규모를 유지하여 농가에게 귀속하는 총 소득을 증대시키도록 노력해야 할 것이다.