• Title/Summary/Keyword: factory management

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Development of a production scheduling system for the real time controlled manufacturing system (실시간 제어가 가능한 일정 계획 시스템 개발)

  • 이철수;배상윤;이강주
    • Korean Management Science Review
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    • v.10 no.2
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    • pp.61-77
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    • 1993
  • This paper involves a study of developing the production scheduling system in a general job shop type mechanical factory. We consider realistic situations in the job-shop environments, such as alternative machines for operation, the new kinds of processes, the machining center with the plural pallet, the operational situation of each machine during the scheduling period, occurings of urgent orders and machine breakdowns. We also propose the methodology of re-schedule. It is very fast and acceptable for real time production control system. These all functions are implemented on IBM PC and program source is written in PASCAL language.

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Dynamic release control policy for the semiconductor wafer fabrication lines

  • Lim, Il-Ho;Kim, Jongsoo
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 1995.04a
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    • pp.939-954
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    • 1995
  • We propose a policy for controlling the release of raw wafers into the semiconductor wafer fabrication lines. The proposed policy exploits up-to-date factory floor information gathered by tracking systems used to calculate the time and amount of a new release to minimize mean flow times and mean tardiness while maintaining the maximum output rates of the system. Extensive computer experiments show that the proposed policy results in significant improvements for the same output rates compared to existing release rules.

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Determination of the Quality Specification Level of Suppliers in a Supply Chain (공급사슬에서 공급자 품질규격수준의 결정)

  • 김기영;윤원영
    • Journal of Korean Society for Quality Management
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    • v.29 no.1
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    • pp.101-112
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    • 2001
  • In supply chain, the quality level of assembly factory depends on the quality levels of suppliers and it is very important to integrate efforts improving the quality levels between producer and suppliers, In this paper, we consider an integrated determination problem of quality specification levels of suppliers. The cost model is developed and the optimal policy under a specific model assumption is obtained. A numerical example is studied.

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A Study on the Man-Hour Computation Based on MODAPTS in Automobile Assembly Line (MODAPTS 기반 자동차 조립공정 공수 산정에 관한 연구)

  • Lee, Chang-Ho
    • Journal of the Korea Safety Management & Science
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    • v.23 no.1
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    • pp.65-70
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    • 2021
  • Domestic as well as global automobile manufacturers are making greater efforts in cost reduction to strengthen the competitiveness. In this study, we developed a program to effectively manage standard time of automobile assembly line, and confirm based on A-automobile factory data. For the purpose, we develop the system which is possible to manage standard time as well as calculate man-hour for automobile assembly line.

Data Management and Analysis in Foundry Industry (1) (주조공정 데이터 처리 및 분석 (1))

  • Cho, In-Sung
    • Journal of Korea Foundry Society
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    • v.42 no.1
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    • pp.35-41
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    • 2022
  • In the present paper, the data management of casting processes has been discussed. In order to construct a smart factory in the foundry industry, understanding of the whole casting processes has to be in the first place. Casting process data can be obtained at the kiosk operated by casting engineers and data acquired by sensors in the foundry facility. However, preprocessing of the casting process data must be carried out in order to analyze the casting process by the data. Techniques and some examples for data preprocessing in the foundry was introduced.

A Study on the Correlation among Occupational Stress, Depression, Health-Related Behavior and Type A Behavior Patterns of Male Workers at a Steel Factory (철강회사 남성 근로자의 직무스트레스, 우울, 건강관련 행위, A형 성격과의 관련성)

  • Jang, In-Sun
    • Korean Journal of Occupational Health Nursing
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    • v.18 no.2
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    • pp.153-164
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    • 2009
  • Purpose: This study investigates the relationship between job stress, depression, health-related behavior and type A behavior patterns among male workers at a steel factory. Methods: The study was done on 171 male workers, using the structured questionnaire. The data were collected in April, 2009 and analyzed by descriptive statistics, t-test, ANOVA, and pearson correlation coefficient. Results: The results showed that 65.5% of workers were under moderate stress, 25.7% high stress and 0.6% extremely high stress. The overall score of these workers' occupational stress was 41.9, lower than the Korean workers' average. Occupational stress was correlated with depression, type A behavior patterns, a very poor physical condition without sufficient sleep. Conclusion: Stress management program is strongly needed for these subjects working over 45 hours a week, with a very poor subjective physical condition, insufficient sleep, type A behavior patterns and signs of severe depression. Further longitudinal study is recommended to show the effect of such worker's stress management program to mitigate job-related stress.

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What makes Korean SMEs adopt Smart Factory initiative? : Empirical evidence from Korean manufacturing SMEs (한국 중소 기업의 스마트 공장 사업 참여 요인에 대한 실증 분석)

  • Lee, Tae-jin;Kim, Young-Jun
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2017.07a
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    • pp.190-193
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    • 2017
  • 인더스트리 4.0 또는 4차 산업 혁명이 큰 화두이고, 그 중심에 제조업의 스마트 공장으로의 변화는 필수불가결의 현상으로 이해되고 있는 상황이다. 이에 한국 정부에서는 스마트공장 보급 사업을 활발하게 추진하여 한국 내 중소기업을 대상으로 스마트 공장 관련 기술을 확산하고자 노력하고 있다. 하지만, 여전히 많은 기업들은 스마트 공장 구축 사업을 받아들이려는 의지가 부족하고 자발적으로 받아들이지 않고 있어, 정부의 사업 확대에 어려움을 가지고 있다. 따라서 스마트 공장 보급 사업을 확대하고 한국 제조업의 경쟁력을 강화를 도모하는데 있어서 과연 어떤 요인이 중소기업들로 하여금 정부의 스마트 공장 관련 사업에 참여하여 관련 기술을 받아들이고, 기업에 적용하게 되는지 분석은 중요한 의미를 가질 것이다. 본 연구는 지난 2년간 스마트 공장 관련 기술을 도입한 기업을 대상으로 한 실증 연구를 통해서 실증 연구를 통해서 스마트 공장 관련 기술의 수용을 위한 중요한 요인이 무엇인지 검증하고, 향후 스마트 공장 관련 기술의 보급 확산을 위한 정책 결정과 사업 추진에 효율적인 추진 방향을 제시하고자 한다.

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IoT based Multi 3D Printers Management for Personalized Manufacturing Service (개인화 제조 서비스를 위한 IoT기반 멀티 3D프린터 관리 방안 연구)

  • Kang, Hyun-chul;Han, Hyon-young;Bae, Hee-chul;Lee, Eun-seo;Son, Ji-yeon;Kim, Hyun;Kim, Young-kuk
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2017.05a
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    • pp.570-571
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    • 2017
  • The manufacturing industry is evolving from the automation process to the intelligent process through ICT convergence As the spread of 3D printers, 3D printing technology is becoming a technology that leads the Industry4.0. In this paper, we propose and implement a multi-3D printer management structure and control method based on IoT optimized for personalized manufacturing services.

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A Finite Capacity Material Requirement Planning System for a Multi-Stage Assembly Factory: Goal Programming Approach

  • Wuttipornpun, Teeradej;Yenradee, Pisal;Beullens, Patrick;van Oudheusden, Dirk L.
    • Industrial Engineering and Management Systems
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    • v.4 no.1
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    • pp.23-35
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    • 2005
  • This paper aims to develop a practical finite capacity MRP (FCMRP) system based on the needs of an automotive parts manufacturing company in Thailand. The approach includes a linear goal programming model to determine the optimal start time of each operation to minimize the sum of penalty points incurred by exceeding the goals of total earliness, total tardiness, and average flow-time considering the finite capacity of all work centers and precedence of operations. Important factors of the proposed FCMRP system are penalty weights and dispatching rules. Effects of these factors on the performance measures are statistically analyzed based on a real situation of an auto-part factory. Statistical results show that the dispatching rules and penalty weights have significant effects on the performance measures. The proposed FCMRP system offers a good tradeoff between conflicting performance measures and results in the best weighted average performance measures when compared to conventional forward and forward-backward finite capacity scheduling systems.

A Study on the Rationalization of Logistics Based on the Design of Variable Desks and Chairs (가변형 책·걸상 설계를 통한 물류합리화에 관한 연구)

  • Kim, Byeongchan;Lee, Changmin
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.15 no.3
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    • pp.89-100
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    • 2019
  • Uniform and integrated college desks and chairs have low efficiency of loading for transportation and delivery and low efficiency of storage for warehousing due to their simple uniform physical properties, thus increasing logistics costs for companies and decreasing their competitiveness. In an effort to overcome the limitations of previous studies, this study analyzed the stages of logistics for desks and chairs in college lecture rooms via the transportation route including the factory warehouses and local warehouses and via the delivery route from local warehouses by the region to the orderers including college lecture rooms. The study developed a model for the rationalization of corporate logistics by making a variable folding desk and chair capable of distance adjustment according to height to replace the uniform and integrated college desks and chairs in lecture rooms. A model was developed between the old uniform and integrated college desks and chairs and the new variable folding desks and chairs for three scenarios of cost development including product storage costs, transportation costs from the specialized factory warehouses to the local warehouses by the region, and delivery costs from the local warehouses to college lecture rooms as the orderer. For the generalization of the model, it was applied to each of the 90%, 95%, and 99% service levels.