• Title/Summary/Keyword: 적정 주문시점

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On-site Inventory Management Plan for Construction Materials Considering Activity Float Time and Size of a Stock Yard (공정별 여유시간과 야적장 규모를 고려한 건설자재의 현장 재고관리 방안 연구)

  • Kim, Yong Hwan;Yoon, Hyeong Seok;Lee, Jae Hee;Kang, Leen Seok
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.43 no.1
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    • pp.79-89
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    • 2023
  • The inventory of many materials requires a large storage space, and the longer the storage period, the higher the potential maintenance cost. When materials are stored on a construction site, there are also concerns about safety due to the reduction of room for movement and working. On the other hand, construction sites that do not store materials have insufficient inventory, making it difficult to respond to demands such as sudden design changes. Ordering materials is then subject to delays and extra costs. Although securing an appropriate amount of inventory is important, in many cases, material management on a construction site depends on the experience of the site manager, so a reasonable material inventory management plan that reflects the construction conditions of a site is required. This study proposes an economical material management method by reflecting variables such as the status of the preceding and following activities, site size, material delivery cost, timing of an order, and quantity of orders. To this end, we set the appropriate inventory amount while adjusting related activities in the activity network, using float time for each activity, the size of the yard, and the order quantity as the main variables, and applied a genetic algorithm to this process to suggest the optimal order timing and order quantity. The material delivery cost derived from the results is set as a fitness index and the efficiency of inventory management was verified through a case application.

Design and Implementation of Apparel Product Support System based on SOA Environment (SOA 환경 기반의 의류 생산지원 시스템 설계 및 구현)

  • Han, Jong-Jin;Choi, Dong-Oun;Song, Hang-Suk
    • The Journal of the Korea Contents Association
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    • v.8 no.4
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    • pp.1-9
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    • 2008
  • SOA sorts function of old applications by function unit that have business meaning, and through standard call interface, do orchestration by component unit of service. System that developed in this paper predicts production point of time when order with frugality of production raw material. And reduce original register resources purchase expense and production costs in proper stock and increase company's competitive power. Also, design and implementation production management system for many species small quantity production of SOA base that reflect this analyzing correctly company's manufacturing process and original register resources supply and demand present condition.

An optimal inventory management system for high-rise building -Focused on Re-bar Works- (초고층 건축공사의 특수성을 고려한 최적 자재 재고 관리 방안에 관한 연구 -철근공사를 중심으로-)

  • Kim, Geun-Hwan;Lee, Su-Hwan;Yun, Jung-Suk;Park, Kyung-Mo;Kim, Chang-Duk
    • KIEAE Journal
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    • v.13 no.1
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    • pp.151-157
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    • 2013
  • Since high-rise building construction sites are usually located in crowded city areas, sufficient spaces for the inventories of key materials are rarely available. This spatial constraints have been one of the critical challenge that may cause productivity loss and increasing costs of the high-rise building construction projects. The proper material inventory management is certaing a key to the success of high-rise building construction projects as it handles difficulty of securing material stock yards, changes in demands, uncertain delivery time through integrating the construction schedules and actively responding to the key materials attributes. In this light, this research analyzes the latest inventory model, (Q,r) model, in accordance with the high rise building characteristics. This research suggests an optimal inventory management of re-bar considering various demands and lead times. The case study is also presented with regard to the re-bar inventory management.

Optimal Inventory Management for Rebar Fabrication Process in Construction Process (건설현장 철근작업 프로세스상의 적정 자재재고 관리 방안에 관한 연구)

  • Jung, Do-Young;Park, Sang-Hyuk;Kwak, Soo-Nam;Kim, Hyoung-Kwan;Han, Seung-Heon
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2006.11a
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    • pp.702-707
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    • 2006
  • There have been certain extent of material inventory in construction site because of difficulties in ordering by small quantity, strategy of securing future requirements and prevention of delay. However, carrying these inventory entails a financial cost called inventory holding cost and decrease construction productivity, so proper inventory management in construction industry is important for construction efficiency and cost reduction. This study tries to find analytical method of inventory management. It includes ordering decision which decide how much to order and when to order. Setting these strategies including deciding safety inventory, input and ouput variability are able to controled.

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