• Title/Summary/Keyword: QA/QC

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THE HISTRICAL CHANGES OF JAPANESE QUALITY CONTROL AND TRENDS AND TASKS OF QUALITY ISSUES

  • Tanaka Hiroshi
    • Proceedings of the Korean Society for Quality Management Conference
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    • 1998.11a
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    • pp.407-412
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    • 1998
  • TQC, the features of Japanese QC (JQC), is forced to change now. There are many problems related to QC field, such as magnification of quality objects, social quality, thoroughness of CS, enforcement of PL law, applications of ISO standards concerning the QA system and the environmental management system, and still more recent American industrial tendency which attaches importance to TQM and so forth. Qn the occasion of JQC have passed for fifty years, since 1945. I would like to look back upon its QC history and discuss the meaning of the recent changes in QC concepts and the theoretical framework of its QC.

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On-line Quality Assurance of Linear Accelerator with Electronic Portal Imaging System (전자포탈영상장치(EPID)를 이용한 선형가속기의 기하학적 QC/QA System)

  • Lee, Seok;Jang, Hye-Sook;Choi, Eun-Kyung;Kwon, Soo-Il;Lee, Byung-Yong
    • Progress in Medical Physics
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    • v.9 no.3
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    • pp.127-136
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    • 1998
  • On-line geometrical quality assurance system has been developed using electronic portal imaging system(OQuE). EPID system is networked into Pentium PC in order to transmit the acquisited images to analysis PC. Geometrical QA parameters, including light-radiation field congruence, collimator rotation axis, and gantry rotation axis can be easily analyzed with the help of graphic user interface(GUI) software. Equipped with the EPID (Portal Vision, Varian, USA), geometrical quality assurance of a linear accelerator (CL/2100/CD, Varian, USA), which is networked into OQuE, was performed to evaluate this system. Light-radiation field congruence tests by center of gravity analysis shows 0.2~0.3mm differences for various field sizes. Collimator (or Gantry) rotation axis for various angles could be obtained by superposing 4 shots of angles. The radius of collimator rotation axis is measured to 0.2mm for upper jaw collimator, and 0.1mm for lower jaw. Acquisited images for various gantry angles were rotated according to the gantry angle and actual center of image point obtained from collimator axis test. The rotated images are superpositioned and analyzed as the same method as collimator rotation axis. The radius of gantry rotation axis is calculated 0.3mm for anterior/posterior direction (gantry 0$^{\circ}$ and 170$^{\circ}$) and 0.7mm for right/left direction(gantry 90$^{\circ}$ and 260$^{\circ}$). Image acquisition for data analysis is faster than conventional method and the results turn out to be excellent for the development goal and accurate within a milimeter range. The OQuE system is proven to be a good tool for the geometrical quality assurance of linear accelerator using EPID.

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QA/QC for Analysis of the Ambient VOC by Using Canister and GC/MS (Canister와 GC/MS를 이용한 대기 중 VOC 분석을 위한 QA/QC)

  • Jeon, Jun-Min;Heo, Dang;Bang, Hye-Jin;Choi, Won-Wook;Kim, Dong-Sool
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2000.11a
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    • pp.85-86
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    • 2000
  • 일반 대기환경중 미량으로 존재하는 휘발성유기화합물 (VOC)은 환경학적 측면에서 다양한 문제점을 야기한다. 즉, 인체 독성 및 발암성 물질, 오존의 전구물질, 성층권의 오존층 파괴 및 지구온난화 물질로서 영향을 주며, 한편, 대기환경 중 장기 체류하기도 한다. 최근 이들 화합물의 농도는 차량 증가 등 여러 요인들에 의해 지속적인 증가추세에 있다. 따라서 VOC로 인한 대기오염의 악화에 따라 체계적인 관리가 요구되고 있으며, 이와 더불어 VOC에 대한 정확한 측정 및 분석 능력에 입각한 신뢰성 있는 자료의 확보가 가장 절실하게 요구되고 있다. (중략)

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온실가스.에너지 목표관리를 위한 품질시스템 구축 방안

  • Lee, Eun-Suk;Jeong, Jang-U;Kim, Geon-Ho;Lee, Seung-Hwan;Lee, Gang-Bok
    • Proceedings of the Safety Management and Science Conference
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    • 2011.04a
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    • pp.519-527
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    • 2011
  • 온실가스 에너지 목표관리 등의 운영 지침 제 54조(품질관리 및 품질보증)에 따라 관리업체는 온실가스 배출량 등의 산정에 대한 정확도 향상을 위해 활동자료 수집, 배출량 산정, 불확도 관리, 정보 보관 및 배출량 보고에 대한 품질관리 활동을 수행하고, 자료의 품질을 지속적으로 개선하는 체제를 갖추는 등 배출량 산정 보고의 정확성과 객관성을 향상시키기 위한 QC/QA 활동을 수행하여야 한다. 본 연구에서는 관리업체가 산정 보고 원칙을 실천함으로써 신뢰할 수 있는 보고서를 작성할 수 있도록 지원하기 위하여 경영진의 검토 및 내부감사, 정보기술(IT) 및 기업 보고를 책임지는 조직 내의 기능을 효율적으로 수행할 수 있는 QC/QA 활동 체계를 구축 하고자 한다. 따라서 체계적인 활동을 할 수 있는 품질시스템을 제시하고 이에 대한 실행방안을 제시하고자 한다.

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An Investigation on Self Certification System of Contractors in the Taiwan High-Speed Rail Project (대만고속철도 건설사업의 시공자 자체 품질관리시스템 운영에 대한 고찰)

  • Lee, Tai-Sik;Lee, Dong-Wook;Bae, Keon;Park, Dong-Chan;Kim, Yul-Kyoo;Sunwoo, Kang;Kim, Young-Hwan;Kim, Dae-Young
    • Proceedings of the KSR Conference
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    • 2001.05a
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    • pp.30-35
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    • 2001
  • THSRC uses the self-certification system for its high-speed rail construction. The self-certification system takes advantages of obtaining good qualify in project and communicating well between contractors and QA/QC organization. But one should understand ISO 9000s and the self-certification system of contractors in advance and contractors try to control Quality of construction spontaneously. Actually, construction progress is slowed down because of increased QA/QC works. For adapting this system in domestic construction, it is need to understand ISO 9000s and the self-certification system.

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