• Title/Summary/Keyword: System Engineering Process

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A Study on Evaluation and Improvement of Production Process Using Arena and Six Sigma in Small and Medium Enterprise (Arena와 Six Sigma를 이용한 중소기업의 공정평가 및 개선을 위한 연구)

  • Lim, Seok-Jin;Park, Song-E;Lee, Woo-Neung
    • Journal of the Korea Safety Management & Science
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    • v.9 no.6
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    • pp.163-169
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    • 2007
  • This study deals with the improvement of production process on a flow production system with the consideration of six sigma. We analyze the production process and survey the important factors of improvement of productivity. Using a six sigma, we find strategic point and suggest a reformation of production process. We applied a simulation technique to simulate the production line proposed by the result of the Six sigma. With the result of the simulation, this study analyzes the propriety of production line and proposes the alternatives of new production process.

Introduction of RAMS and Certificate Process for Railway System based on International Standard and Practices (국제표준기반의 철도 RAMS와 인증 프로세스 소개 및 그 적용사례)

  • Choi, Yo Chul
    • Journal of the Korean Society of Systems Engineering
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    • v.11 no.1
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    • pp.49-54
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    • 2015
  • The RAMS Process is the Internationally required activity to secure Reliability, Availability, Maintainability, and Safety of system which will be acquired as customer requirements. The importance are situations that have been growing gradually. Specially, When developing railway system, the needs of customer about RAMS Process has been being proposed in a variety of railroad business. Through this paper, It introduces the international standards described the RAMS Process and also presents the requirements that should have to comply with it. Furthermore, the necessary activities to get certificate of a Railway system are suggested and not only the various acquisition cases of certificate but also lessons learned by cases in the field of railway signalling system are presented.

Intelligent Decision System for Purging a Residual Gas inside Tubing in Semiconductor Process (반도체공정의 Tubing 내 잔여가스제거 지적결정시스템)

  • Lee, Sa-Hwan;Huh, Yong-Jeong;Choi, Seong-Joo;Lee, Jong-Rark
    • Journal of the Semiconductor & Display Technology
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    • v.5 no.4 s.17
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    • pp.23-27
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    • 2006
  • Semiconductor industry has been dramatically developed with the information era of 21C, and the trend now is to consider that the technology of management system of the computer utility that has a high efficiency is important. This study investigated the intelligent decision system for residual gas purge process to effectively remove the residual gas in the tube after replacing the cylinder that is used for the gas cabinet or BSGS(Bulk Specialty Gas Supply System) of the semiconductor process. It was suggest from this study that it is possible to decide the type, frequency and volume of purge gas using various toxic gases which is necessary for each process. Also, this result will be utilized for operating the system, increasing the efficiency of management and saving energy.

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Study of LNG Reliquefaction Process in LNG Carriers (LNG 선박에서 천연가스 재액화공정의 재액화량에 관한 연구)

  • Ko, Byoung-Seok;Kim, Bum-Su;Lee, Heon-Seok;Kang, Yun-Jin;Kim, Min-Seop;Ko, Jae-Wook
    • Journal of the Korean Institute of Gas
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    • v.14 no.1
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    • pp.21-27
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    • 2010
  • In the past vaporized gases from a carrier were burned or used for fuel. Due to the movement of bigger LNG carriers and using diesel engine, it is limited that ways of deposing vaporizes gases from the carrier by the act of environment. For getting over the problem, a reliquefaction process is considered. Even though the reliquefaction process was created to three generation process, it has been researched and developed to optimize the process. Basically the reliquefaction process is compartmentalized into Reverse Brayton Cycle System and Claude Cycle System. This research is focused on the reliquefaction efficiency with the systems and changing equipments arrangement by using HYSYS. The result could be use for a design of a reliquefaction process.

PDM Based Design Knowledge Management System (PDM기반의 설계지식 관리 시스템)

  • 박성범;박홍석;여승훈;이규봉
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.1394-1397
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    • 2004
  • Company perform a lot process to produce products. If company try to satisfy for customer and improve technological competition, they must be changed to new system. As a result, we developed knowledge based smart search system and customized it to PDM system on commercial use. In this smart search system, wherever process designer can seek to result quickly. This will be upgraded for be applied to some company.

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Design of Digital Moister Expert System for Product Design Support (제품 설계 지원을 위한 디지털 마이스터 전문가 시스템의 설계)

  • Kang H.W.;Nam S.H.;Hong W.P.;Lee S.W.;Choi H.J.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2005.10a
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    • pp.938-941
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    • 2005
  • Recently We make a study of the process expert system model in 2005 process expert system concepts is applied to the digital meister expert system development. Well-designed expert systems imitate the reasoning processes experts use to solve specific problem. Specially, expert systems are used to the engineer in manufacturing industry fur the process control, production management and system management. In this paper, we propose the digital moister expert system fur product design process in manufacturing industry and we present introduction and contents of design process expert system methodology and software far the air purifier design system.

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Identification of the process in closed-loop control system

  • Oura, Kunihiko;Akizuki, Kageo;Hanazaki, Izumi
    • 제어로봇시스템학회:학술대회논문집
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    • 1994.10a
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    • pp.140-145
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    • 1994
  • In this paper, we consider a problem to estimate process parameters using input-output data collected from the process operating in closed-loop control system. When orders and delay-time of the process are known correctly, under some conditions of identifying experiments, it is reported that accurate identification results can be obtained by applying prediction error method. To get accurate estimates, it is necessary to know orders and delay-time of the process. It is difficult to determine them in closed-loop identification, because ill-condition for identification are easily caused by selection of unsuitable order or delay time. Furthermore, the procedures to select orders and delay-time in open-loop identification aren't always available in closed-loop identification. The purpose of this paper is to determine a delay-time under suitable assumption that order of the process are known as the first step.

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Web-base integrated BPM system framework for the new product development of automotive suppliers (자동차 부품업체를 위한 웹 기반 통합 신제품 개발 BPM 시스템 Framework)

  • 유석규;최병규;황현철;사공극
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.34-37
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    • 2003
  • This paper proposes a BPM(Business Process Management) system framework for the NPD(New Product Development) of automotive suppliers. Recently many enterprises change their organization from function-oriented to process-oriented through BPR (Business Process Reengineering). Especially, based on quality systems like QS9000, it is required to documented business processes and continuously improve these processes for customer satisfaction. NPD, the most significant function for industrial competition, is reinforced by the best practices business process to satisfy the requirements of quality systems. The main objective of the paper is the development of the information system that supports the best practices process management. For this, first, we define the requirements of BPM system for NPD based on the viewpoint analysis, and then propose a DES (Design Execution System) framework based on dynamic workflow engine. The DES is addressed in the characteristics of a NPD business process, integrated project management, and process execution. A prototype DES system has been developed in the web environment. Its validity is demonstrated by applying it to an automotive supplier.

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Planning of Development of the Operational Concept Document of the "3D Model Based Digital Collaboration System" : Case Study ("3D 모델기반 디지털 협업 시스템" 운용개념 개발 방안 수립 사례)

  • Kim, Jin Il;Cha, Jae Min;Lee, Tae Kyoung;Kim, Joon Young
    • Journal of the Korean Society of Systems Engineering
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    • v.13 no.2
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    • pp.42-48
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    • 2017
  • OCD (Operational Concept Document) is very important in system development. To develop OCD we should answer questions about, what template to use, what is the overall process to develop OCD, what kinds of diagrams we should use and how can we validate the OCD. To answer about the template we compared tow industrial guide on operational concept development and tailored it. For development process, we proposed a comprehensive process which satisfies the requirements of the project context. For use of proper diagram, we analyzed many kinds of diagrams used in representing behavior of system and choose some diagrams which best fit for our purpose. Finally we established validation criteria for operational scenario and requirement texts in operational concept documents.

Process Quality Improvement through Improving Measurement System for Internal Diameter of Gun Barrel (포신 내경 측정시스템 개선을 통한 공정품질 향상)

  • Park, Young Min;Bae, In Hwa;Kim, Sang Boo
    • Journal of Korean Society for Quality Management
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    • v.51 no.4
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    • pp.633-642
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    • 2023
  • Purpose: The variation of the internal diameters of gun barrel incurs a lot of reworks in gun barrel manufacturing process and the significant quality problem of gun barrel. And it is likely to stem from the current measurement system for the internal diameter of gun barrel and the related manufacturing process as well. The purpose of this study is to improve the gun barrel manufacturing process through improving measurement system. Methods: The improved measurement system using laser can measure the internal diameters of gun barrel more accurately, and the properly adjusted honing process reduces the variation of internal diameters of gun barrel. Results: Comparing the mean square error of internal diameters for 6 gun barrels measured before and after process improvement shows that the variation of gun barrel internal diameters was significantly reduced after the process improvement. Conclusion: The introduction of improved measurement system for the internal diameters of gun barrel and the adjustment of related honing process results in the reduction of reworks of gun barrels and their internal diameter variations.