• Title/Summary/Keyword: Production and Inventory Management

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A Study on the Productivity Increment through Construction of Lean Production System for Automobile Plant in China (중국 자동차 공장의 린 생산 체계 구축을 통한 생산성 향상에 관한 연구)

  • Jang, Jung-Hwan;Zhang, Jing-Lun;Yoo, Sung-Hee;Lee, Chang-Ho
    • Journal of the Korea Safety Management & Science
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    • v.14 no.1
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    • pp.117-122
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    • 2012
  • This paper deals with the productivity increment through construction of lean production system for automobile factory in China. This lean production system has been progressed according to 5 steps. Step 1 is the work preparation. Step 2 is the process design. Step 3 is the establishment of method to count production quantity. Step 4 is the establishment of measuring method for input and output. Finally, step 5 is the construction of flexible production system able to adapt for environment change. This lean production system is expected to obtain the productivity increment by 50% for plastic plant and reduction by 50% in inventory quantity.

A Study on the Optimization of Integrated Supply Chain using Quickest Path Method (최속경로문제를 고려한 통합공급사슬 최적화에 관한 연구)

  • Gwon Su Tae;Eom Yong Ho
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 2003.05a
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    • pp.14-20
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    • 2003
  • Supply chain is the link that moves products between suppliers, manufactures, wholesalers, distribution, retailers and ended consumers. Supply chain management(SCM) is a way to supervise the flow of products, materials and information as they move along the supply chain. In the recent years, Most of the companies are in a hurry the introduction of SCM to obtain international competitiveness. The goal of SCM is to optimize the supply chain, which can not only reduce inventories, but may also create a higher profit margin for finished goods by giving customers exactly what they want. There are four major decision areas (location, production, inventory, transportation) in supply chain management, and there are both strategic and operational elements in each of these decision areas. This paper is concerned with the integrated production planning problem including not only the production cost but also the transportation cost in supply chains, and an efficient algorithm using genetic algorithm and quickest path method is presented to solve the problem.

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An Information System for Production Management of the Injection Molding Factory (사출공장의 생산관리를 위한 정보시스템 구축에 관한 연구)

  • Joo, Cheol-Min;Lee, Byung-Gun;Jung, Hyun-Seok
    • Journal of the Korean Data and Information Science Society
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    • v.10 no.1
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    • pp.251-259
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    • 1999
  • In this paper, a case study is introduced on the development of an information system for production management in the injection molding factory. For the systematic management of the information derived from the whole production process, an integrated and computerized information system is needed. In this paper, an integrated information system of production management for the W company is developed to manage the whole information related with make-to-order, production, delivery, and inventory, and so forth.

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A Development of Reverse Supply Chain Simulation Model Considering a Recycling (재활용을 고려한 역공급사슬 시뮬레이션 모델 개발)

  • Lim, Seok-Jin;Park, Byung-Tae
    • Journal of the Korea Safety Management & Science
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    • v.11 no.4
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    • pp.193-199
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    • 2009
  • Recently, an industrial production-distribution planning problem has been widely investigated in Supply Chain Management(SCM). One of the key issues in the current SCM research area is reverse logistics network. This study have developed a simulation model for the reverse logistics network. The simulation model analysis reverse logistics network issues such as inventory policy, manufacturing policy, transportation mode, warehouse assignment, supplier assignment. Computational experiments using commercial simulation tool ARENA show that the real problems. The model can be used to decide an appropriate production-distribution planning problem in the research area.

The Optimal Base-Stock Level in Assembly lines (조립 생산 시스템에서 최적 Base-Stock 수준)

  • Ko, Sung-Seok;Seo, Dong-Won
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.30 no.3
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    • pp.89-93
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    • 2007
  • In this study, we consider an assembly line operated under a base-stock policy. A product consists of two parts, and a finished product transfers to a warehouse in which demands are satisfied. Assume that demands arrive according to a Poisson process and processing times at each production line are exponentially distributed. Whenever a demand arrives, it is satisfied immediately from an inventory in the warehouse if available; otherwise, it is backlogged and satisfied later by the next product exiting from production lines. In either case, an arriving demand automatically triggers the production of a part at both production lines. These two parts will be assembled into a product that eventually transfers to the warehouse. We obtain a closed form formula of approximation for delay time or lead time distribution of a demand when a base- stock level is s. Moreover, it can be applied to the optimal base-stock level which minimizes the total inventory cost. Numerical examples are presented to show our optimal base-stock level's quality.

MAINTENANCE SETUP AND SETUP PERFORMANCE IMPROVEMENT IN AN UNRELIABLE PRODUCTION SYSTEM

  • Lee, Chang-Hwan
    • Management Science and Financial Engineering
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    • v.3 no.1
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    • pp.57-74
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    • 1997
  • An EOQ-like inventory model for a manufacturing process is studied. The system is assumed to deteriorate during the production process. The results are either the production of a number of defective items, or the breakdown of the production machine. The optimal production lot size is derived. The model is extended to the case in which the probabilities of making defective items and machine breakdowns are a function of both the quantity (amount) and quality (performance) of the consumed setup cost (including the preventive maintenance cost). We further assume that the setup performance can be improved by investing in the performance improvement program. Hence, the same or a better setup outcome can be achieved with a lower setup cost. We then investigate the optimal setup cost and investment policy simultaneously, thereby achieving a better process quality and setup cost reduction concurrently.

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A Study on MES Construction for Automobile Plant in China (중국 자동차 공장의 MES 구축 연구)

  • Lee, Doo-Yong;Zhang, Jing-Lun;Jang, Jung-Hwan;Yoo, Sung-Hee;Lee, Chang-Ho
    • Journal of the Korea Safety Management & Science
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    • v.14 no.4
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    • pp.265-270
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    • 2012
  • This paper deals with the application and effects of MES for H automobile plant in China. There existed the production planning and the different work order in PL painting plant, but we can simultaneously prepare the painting parts and parts delivery and assembly according to painting color by introducing MES. We can respond the change of production planning and operate integratively the PL painting, parts storage and parts delivery and then we can results in reasonable logistics. We obtained the exact production information, correct work order, precise delivery order. We obtained not only the improvement of logistics but also the reduction of inventory.

An Empirical Study on the Use of POS System for Inventory Efficiency (기업의 재고 수준 효율화를 위한 POS 시스템 활용에 관한 연구)

  • Han Chang-Yup;Jang Hyeong-Wook
    • Journal of Korea Society of Industrial Information Systems
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    • v.10 no.1
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    • pp.81-88
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    • 2005
  • The POS system has been developing into an co-operational information integration system, enlarging its range of application - from basic data collection to production information, inventory management and customer service. The POS system will increase operation efficiency. It is my suggestion that POS system should be adopted in domestic industries regardless of increasing adoption of the RFID. This paper was made studied of the POS system and the practical use of POS system in order to maximize the efficiency of inventory management for various companies.

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Lead Time Analysis for Transportation Mode Decision Making (輸送手段의 選擇을 위한 리드타임 分析)

  • 문상원
    • Journal of the Korean Operations Research and Management Science Society
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    • v.13 no.1
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    • pp.47-47
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    • 1988
  • Rapid globalization of production and marketing functions makes choice of international transportation mode of great importance. In this paper, transportation mode is characterized by two factors, mean and variability of transportation lead time. We developed a simple mathematical model to estimate the relative impact of mean lead time, lead time variance and demand variance on the required average inventory level under specified service rates.

A Study on Stock Management and Reduction for Apparel Industry (국내 의류업체의 재고처리 및 재고감축실태 연구)

  • 장은영
    • Journal of the Korean Society of Costume
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    • v.51 no.2
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    • pp.53-64
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    • 2001
  • The purpose of this study is to create the program for efficient inventory management and reduction, investigating the present conditions and factors of the inventory throughout current apparel industry. The research method applied in this study is to survey 92 domestic companies which were randomly selected with respect to the kinds of goods produced : men′s wear, women′s wear, and unisex wear. The research can be summarized as follows : 1. The seasonal stock rate of current apparel industry was 28.75%, and the rate of men′s wear companies was higher than that of women′s and unisex wear companies. 19.43% of stock cost reflection rate was applied, and the stack cost of men′s and women′s wear companies was higher than that of unisex wear companies. 2. Periodic bargain sale was the most frequently used way of stock clearance, and "uniform price sale"and outlet stores were the second and the third irrespectively. Unisex wear companies appeared to be more enthusiastic in stock clearance than the companies belonging to the other two categories. The main places for the stock clearance were department stores, outlet stores and enterprises specialized in the stock clearance. 3. QR production was proved to be the most commonly adjusted method of stock reduction, and the emphasis on development of new design and the utilization of stock management system through computer network were the next, While unisex wear companies had established the positive policies, men′s wear companies took lukewarm altitudes in every aspect. The companies selling on an order were 18.64%, and unisex wear companies showed the higher rate. The lead-time after QR production was 10.91 days, and it seemed to take more time for men′s wear companies than for women′s and unisex wear companies. The rate of the chance in stock was proved to decrease by 12.94%, and there was found no meaningful difference among the three categories of apparel companies.

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