• Title/Summary/Keyword: Reasonable production system

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An Integrated Production Management Model for a Manufacturing System (제조시스템을 위한 통합형 생산관리모형 구축)

  • Ahn, Jae-Kyoung
    • IE interfaces
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    • v.16 no.1
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    • pp.111-116
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    • 2003
  • Business integration has been considered as one of the most critical success factors that enable the firms to gain competitive edges. Despite this trend, it has also been found among not a few companies that the activities that should be functionally tied with are performed even independently. In this study, an integrated model of production planning and inventory has been developed. Computerization of the production planning activities is proposed and implemented. We also proposed the reasonable inventory levels of each item using historic data of the items, which are composed of safety stock from the given fill-rate, operating stock from the production patterns, and reserved stock from the production planning. This study has helped the firm to have clearer job definition of the related processes, to tightly control the inventory by setting and tracing the reasonable fill rates for every product, and to quickly respond to the market changes through the computerized production planning process.

An Integer Programming Model and Heuristic Algorithm to Solve Batch Production Scheduling Problem Considering Idle State (대기 상태를 고려한 배치 단위 생산 공정에서 생산계획 수립을 위한 정수계획법 모형 및 휴리스틱 알고리즘 개발)

  • Han, Jung-Hee;Lee, Young-Ho;Kim, Seong-In;Park, Eun-Kyung
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 2006.11a
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    • pp.506-512
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    • 2006
  • In this paper, we propose a lot-sizing and scheduling problem that seeks to minimize the sum of production cost and inventory cost over a given planning horizon while considering idle state of a machine in a batch production system. For this problem, we develop an integer programming model. And, we develop an efficient 2-phase heuristic algorithm to find a high quality feasible solution within reasonable time bounds. In the first phase, we seek to minimize the production cost by assigning batches to machines. Then, in the second phase, we find a production sequence of batches that reduces the inventory cost, while considering adding or deleting idle states between batches. Computational results show that the developed heuristic algorithm finds excellent feasible solutions within reasonable time bounds. Also, we could significantly reduce the total cost consisting of production cost and inventory cost by using the developed heuristic algorithm at a real manufacturing system that produces zinc alloys.

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A comparative study on the estimation methods for the potential yield in the Korean waters of the East Sea (한국 동해 생태계의 잠재생산량 추정방법에 관한 비교 연구)

  • LIM, Jung-Hyun;SEO, Young-Il;ZHANG, Chang-Ik
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.54 no.2
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    • pp.124-137
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    • 2018
  • Due to the decrease in coastal productivity and deterioration in the quality of ecosystem which result from the excessive overfishing of fisheries resources and the environmental pollution, fisheries resources in the Korean waters hit the dangerous level in respect of quantity and quality. In order to manage sustainable and effective fisheries resources, it is necessary to suggest the potential yield (PY) for clarifying available fisheries resources in the Korean waters. So far, however, there have been few studies on the estimation methods for PY in Korea. In addition, there have been no studies on the comparative analysis of the estimation methods and the substantial estimation methods for PY targeted for large marine ecosystem (LME) For the reasonable management of fisheries resources, it is necessary to conduct a comprehensive study on the estimation methods for the PY which combines population dynamics and ecosystem dynamics. To reflect the research need, this study conducts a comparative analysis of estimation methods for the PY in the Korean waters of the East Sea to understand the advantages and disadvantages of each method, and suggests the estimation method which considered both population dynamics and ecosystem dynamics to supplement shortcomings of each method. In this study, the maximum entropy (ME) model of the holistic production method (HPM) is considered to be the most reasonable estimation method due to the high reliability of the estimated parameters. The results of this study are expected to be used as significant basic data to provide indicators and reference points for sustainable and reasonable management of fisheries resources.

An Analysis on the Influence Factors relative to Reliability of Standard Production Unit System (표준품셈의 신뢰성에 대한 영향요인 분석)

  • Kim, Yong-Woo;Shin, Won-Sang;Son, Chang-Baek
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2011.05a
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    • pp.187-189
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    • 2011
  • Standard production unit system has been used as accumulated standard for the cost estimation of public construction projects. However, it is difficult to estimate reasonable cost due to adaptation of a uniform standard and reflect changes in the technology. The purpose of this study is to provide basic data for improvement of standard production unit system through the identifying problems and analysing its influence on enactment and/or revision work of standard production unit system.

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Information retrieval system for efficiency of getting information about construction (건설자재 정보 제공의 효율성을 위한 정보검색체계 연구)

  • Oh, Yong-Seok;Song, Jeong-Hwa;Oh, Kun-Soo
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2008.04a
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    • pp.231-234
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    • 2008
  • Each corporation isn't consistent because of offering specific information for publicity. It spends considerable labor force and time surfing of the material information and choosing need material. That's the reason it's different with material information and choice system between production and marketing corporation. Among lots of material information, some of them are used by offering material information simplify. So it is demanded necessity of reasonable material choice system. That system helps it choose a material more easily. So we studied about the information retrieval system of reasonable material choice through the study about assortment system of material information and material choice method. It's the basic study for the suggestion of reasonable material choice system. According to this study, if that system is suggested and realized, we can overcome from the system of typical and repeatable at every course of architecture during several times. It will be helpful to increase about the productivity of architecture as the minimization of time, labor, resource and cost for the material choice.

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Standardization of Clothing Sizing System (의류 표준화에 관한 연구)

  • Choi Kyung Jin;Shon Hyei Sook;Huh Moon Yeol
    • Journal of the Korean Society of Clothing and Textiles
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    • v.5 no.2
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    • pp.69-73
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    • 1981
  • With the advance of technology, the order-made clothes gradually give way to ready-made clothes. It is already well-known that more than 80 percentage of Japanese are choosing ready-made clothes while less than 5 persons out of 100 are spending their money and valuable time to have their clothes order-made in the United States. One of the fundamental steps to reach the system of mass production of clothes is recognized as a 'reasonable' sizing system. 'Reasonable' can be interpreted 'optimum' in the sense of minimum loss from both producers and customers. This paper desires the methodology to obtain the sizing system utilizing the human body measurement data, The suggested methodology could be extended to the sizing system for the design of other items including industrial equipments.

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An Empirical Study of Production Scheduling Model Establishment by LP Technique (LP기법에 의한 생산계획 모형수립의 실증적 연구)

  • 최원용
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.19 no.40
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    • pp.203-217
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    • 1996
  • This thesis describes a quantitative decision-making of production planning system. A mathmatical model of Linear Programming is used set up a production scheuling under the assumption. As the emphasis is laid on the applicability of the developed model, the linrar programming is applied to establish the production schedule for "F" furniture company which produces kitchin cabinet and OA furniture, The optimal solution is obtained by using the LP package, QBS. By the solution reduced to 14% of work force compared with the real data during all of the planning horizon. And it is also possible to reduce the work-force of the lowest level of employee by 10% for the reasonable management. There are some limitations in computerized data processing, which is only considering the economic costs without considering any external environment of case enterprise. As a result, it is shown that the LP model is very useful method of make aggregate production schedule. schedule.

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Study on the reasonable management of the lacquer in Wonju through the agricultural system approach (농업시스템분석을 통한 원주 옻의 합리적 관리방안 연구)

  • Oh, Hyun-Seok;Kim, Jeong-Seop
    • Journal of Korean Society of Rural Planning
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    • v.6 no.2 s.12
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    • pp.20-33
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    • 2000
  • The lacquer is one of the most important resources for endogenous development and cultural reproduction in Wonju. However traditional and social network, which had been formed by lacquer farmers, group of lacquer-pickers, refineries, and lacquer-ware craftsmen, is being collapsed. It is due to the recent imports of raw lacquer from China and refined lacquer from Japan. Public sectors including Wonju city have continuously improved the potential of lacquer production by planting lacquers. However, the potential of lacquer production isn't under enough condition to realize its value. In this study, it is suggested that the efforts of public sectors to raise lacquer industry, focused on the improvements of lacquer production potential until now, should be concentrated on realization of the production potential by reconstructing social productive system which is composed of diverse groups involved in lacquer ware production.

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An Optimization Model for an Production-Distribution Planning with Consideration of a Transportation Time (운송시간을 고려한 생산-분배계획을 위한 최적화모델)

  • Lim, Seok-Jin;Jeong, Suk-Jae
    • Journal of the Korea Safety Management & Science
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    • v.10 no.1
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    • pp.139-144
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    • 2008
  • Recently, a multi-facility, multi-product and multi-period 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 involves reducing both production and distribution costs. We have developed an optimization model to tackle the above problems under the restricted conditions such as transportation time and a zero inventory. Computational experiments using commercial tool Ms-Excel Solver show that the real size problems we encountered can be solved in reasonable time. The model can be used to decide an appropriate production-distribution planning problem in SCM research area.

A study of production Management application status, analysis and set up reasonable production management System model for Small-medium industry Company in Korea (국내 중소광공업의 생산관리 적용 실태분석과 그 적정 모델설정에 관한 연구)

  • 신용백;김원중;김광섭
    • Journal of the Korean Professional Engineers Association
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    • v.14 no.2
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    • pp.52-61
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    • 1981
  • In Korea Small-medium Companies Constitutes 96.5% of all of the mining and manufacturing industries, about 35.7% of the total production of value added business, an average of 35% of the actual export of industrial goods and 47.6% of employment since present at the end of 1979. Now then Small-medium Industry Companies organization style constitutes 78.6% of a form of private company and 81.2% of the total on an small scale under 50 persons inregular employee. Specially, the trouble of business management of the mining and manufacturing Companies in Korea are constituted average 28.3% of production management ill the worst trouble of business management from 1973 to 1979 and small-medium industry Companies are the same of about more than 30% of production management in the trouble of business management. In this cases, the status of production management is effected by small-medium industry companies are the style of non-system and non-organization, but then 13parts in production management operations have the many trouble problems. In this circumstances a change for the better of production management operations in small medium industry companies are suggested the application effects and achievement points of production management, it is suggested a kind of variety and a small quantity, production management system of small-medium industry Company. And then Industrial Engineering technics is applied systematic route and the company grow more than better its physical condition for the improve productivity applied system approach for production management. There for the chapter 4-5 of this paper treats of a rational production management system approach, it make a emphatic major point of high level of economic growth of small medium Industry enterprise.

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