• Title/Summary/Keyword: Quality assurance system

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STATE TOKEN PETRI NET MODELING METHOD FOR FORMAL VERIFICATION OF COMPUTERIZED PROCEDURE INCLUDING OPERATOR'S INTERRUPTIONS OF PROCEDURE EXECUTION FLOW

  • Kim, Yun Goo;Seong, Poong Hyun
    • Nuclear Engineering and Technology
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    • v.44 no.8
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    • pp.929-938
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    • 2012
  • The Computerized Procedure System (CPS) is one of the primary operating support systems in the digital Main Control Room. The CPS displays procedure on the computer screen in the form of a flow chart, and displays plant operating information along with procedure instructions. It also supports operator decision making by providing a system decision. A procedure flow should be correct and reliable, as an error would lead to operator misjudgment and inadequate control. In this paper we present a modeling for the CPS that enables formal verification based on Petri nets. The proposed State Token Petri Nets (STPN) also support modeling of a procedure flow that has various interruptions by the operator, according to the plant condition. STPN modeling is compared with Coloured Petri net when they are applied to Emergency Operating Computerized Procedure. A converting program for Computerized Procedure (CP) to STPN has been also developed. The formal verification and validation methods of CP with STPN increase the safety of a nuclear power plant and provide digital quality assurance means that are needed when the role and function of the CPS is increasing.

Improving Construction Site Supervision with Vision Processing AI Technology (비전 프로세싱 인공지능 기술을 활용한 건설현장 감리)

  • Lee, Seung-Been;Park, Kyung Kyu;Seo, Min Jo;Choi, Won Jun;Kim, Si Uk;Kim, Chee Kyung
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2023.11a
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    • pp.235-236
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    • 2023
  • The process of construction site supervision plays a crucial role in ensuring safety and quality assurance in construction projects. However, traditional methods of supervision largely depend on human vision and individual experience, posing limitations in quickly detecting and preventing all defects. In particular, the thorough supervision of expansive sites is time-consuming and makes it challenging to identify all defects. This study proposes a new construction supervision system that utilizes vision processing technology and Artificial Intelligence(AI) to automatically detect and analyze defects as a solution to these issues. The system we developed is provided in the form of an application that operates on portable devices, designed to a lower technical barrier so that even non-experts can easily aid construction site supervision. The developed system swiftly and accurately identifies various potential defects at the construction site. As such, the introduction of this system is expected to significantly enhance the speed and accuracy of the construction supervision process.

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Needs-Based Customer Value Effects of Family Restaurants on Customer Satisfaction and Behavior Intention (패밀리레스토랑의 욕구체계 기반 고객가치가 고객만족, 행동의도에 미치는 영향: 4×4 매트릭스 욕구체계를 중심으로)

  • Kim, Ki-soo;Shim, Jae-Hyun
    • Journal of Distribution Science
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    • v.11 no.12
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    • pp.51-62
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    • 2013
  • Purpose - A pre-study on service quality-based customer value is conducted with the path structure (perceived value of service quality→customer satisfaction→behavior intention) based on the hierarchical model of service quality including interaction and outcome quality, physical environment quality and the SERVQUAL model of process quality, namely, reliability, responsiveness, assurance, empathy, and tangibles. In addition, customer value in the service industry is studied by dividing into the two-way structure of utilitarian and emotional values. This study classifies customer values of family restaurants through the customer value model based on the 4×4 matrix needs system of Jeon and Kim (2009). It illustrates the path structure of customer value→customer satisfaction→behavior intention targeting college students in order to generalize the customer value system of family restaurants. Research design, data, and methodology - This study established seven hypotheses based on the relationship between each type of customer value (food quality, convenience, social, emotional, interior quality, service encounter, and purchasing) and customer satisfaction, and the relationship between customer satisfaction and behavior intention. The study data were collected from students in the Department of Business and Tourism at Kimpo University. In all, 294 survey papers were returned of the 300 distributed: 253 pieces were used in the final analysis excluding 41 with insufficient and less effective answers. For statistical analysis, the statistics software package SPSS 15.0 was used. Results - The results of the analysis are as follows: first, the customer values of family restaurants are classified by seven customer values: goods quality value, emotional value, convenience value, social value, purchasing value, service encounter value, and inner quality value. Second, emotional value, purchasing value, service encounter value, and inner quality value had positive impact on customer satisfaction. In particular, purchasing value through being included in functional value was not classified in the previous study; however, this study could classify and generalize this value in a new way. Finally, customer satisfaction had a positive impact on behavior intention. This showed that college students had behavior intention - repurchase intention and word-of-mouth - because they could be content with the food items on the menu and the service provided by employees. Conclusions - The main points based on the above-mentioned results are as follows. This study with college students as study subjects could be classified into four dimensions, namely, generic value, usage value, purchasing value, and physical value and seven sub-dimensions on customer values of family restaurants based on a 4×4 matrix needs system. Then, to confirm its generalization, the path structure of customer value→customer satisfaction→behavior intention was verified. While existing pre-studies used simplified values by classifying restaurant values largely as utilitarian value and hedonic value, this study classified various forms of customer value, and that customer value especially could be expanded by adding purchasing value. As a result, it is shown that marketers need to diversify their customer services because this study proved that customer values can be classified in various ways based on customer needs.

A Study on the Waviness Compensation System of Ultraprecision Machining (초정밀가공의 파상도 보정시스템에 관한 연구)

  • Kim, Jeoung-Du
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.7 no.6
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    • pp.132-140
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    • 1998
  • Recently, precision machining technology has been developed continuously in order to make high productivity and quality assurance of the precision parts of several industrial fields. Waviness may occur on the surface of the machined parts due to the table motion error and the dynamic cutting mechanism between the tool and the workpiece. The waviness may fall off the form accuracy of the precision machine parts. In the research, a micro cutting device with piezoelectric actuator has been developed to control precise depth of cut and compensate the waviness on the surface of the workpiece. Experiments have been carried out in the precision lathe. The characteristics of the surface profile and cause of the waviness profile have been analyzed and waviness profiles of some cause have been compared with those of experiments.

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Commissioning and Validation of a Dedicated Scanning Nozzle at Samsung Proton Therapy Center

  • Chung, Kwangzoo;Han, Younyih;Ahn, Sung Hwan;Kim, Jin Sung;Nonaka, Hideki
    • Progress in Medical Physics
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    • v.27 no.4
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    • pp.267-271
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    • 2016
  • In this study, we present the commissioning and validation results of a dedicated scanning nozzle. The dedicated scanning nozzle is installed in one of the two gantry treatment rooms at Samsung Proton Therapy Center. Following a successful completion of the acceptance test, the commissioning process including the beam data measurement for treatment planning system has been conducted. Extended measurements have been conducted as a validation of the clinical performance of the nozzle and various quality assurance protocols have been prepared.

GLP-Application to Cell Culture-Based Toxicity Tests

  • Koh, Woo-Suk
    • Proceedings of the Korean Society of Toxicology Conference
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    • 2006.11a
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    • pp.95-101
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    • 2006
  • Compare to the toxicity tests using experimental animals, the GLP application and compliance in toxicity studies using cell culture systems may be less straightforward elucidated in the two documents published by the OECD Working Croup on GLP 'The Application of the GLP Principles to Short Term Studies (1999)' and 'The Application of the Principles of GLP to in vitro Studies (2004)' The object of this presentation is to show how to interpret the GLP principles and to apply with actual performances in a well known toxicity test using cell culture, chromosome aberration study. The presentation will cover test substance, test system (cell line), study environment management, documentation, quality assurance, and study protocol and report.

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Durability and Reliability Improvement for the Rubber Mount of Industrial Trucks (산업용차량 고무마운트 부품에 대한 내구성 및 신뢰성개선)

  • Jung, Won
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.30 no.3
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    • pp.127-134
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    • 2007
  • Predicting fatigue life of rubber components is an important issue in design procedure for industrial trucks to assure the durability and reliability. Main considerations in designing rubber components against fatigue failure are the compounding technology, shape design, and manufacturing process. Among them the rubber compounding technology is one of the most critical factor to determine more than 50% of component's quality. This paper presents how to improve the durability and reliability of industrial rubber mount during its design, development and prototype testing. The data presented illustrates explicitly the prediction of reliability growth in the product development cycle. The application of these techniques is a part of the product assurance function that plays an important role in rubber components reliability improvement.

A study on the application of Plateau equalization algorithm for contrast enhancement of real-time thermal image (Plateau equalization 알고리즘을 적용한 실시간 열영상 대조비 개선에 관한 연구)

  • Cho Heung-Gi;Kim Soo-Gon;Lee Jeong-Bok;Lee Won-Sun;Jeon Hee-Hong
    • Proceedings of the KIPE Conference
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    • 2002.11a
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    • pp.186-189
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    • 2002
  • Real-time thermal image is obtained by thermal imaging systems measuring radiant emittence according to law of Plank's blackbody radiation. The histogram of thermal image is not uniform. The signal bands of background and target are separated and grouped in narrow bands. In such a system, contrast enhancement indispensible to distinguish target from background. In this study, plateau histogram equalization using local histogram is proposed for contrast enhancement.

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Detectibility of Internal Defects in Aluminum Die-casted Rotor Using Ultrasonic Technique (초음파를 이용한 알루미늄 다이캐스팅 회전자 내부 결함 검출능 평가에 관한 연구)

  • Lee, Jun-Hyeon;Choe, Sang-U
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.12
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    • pp.185-191
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    • 2001
  • The aluminum die-casting technique has been widely used to manufacture a rotor in motor industry because of its highly productivity, even though it sometime causes the various type of defects in the rotor, such as shrinkage, cavity, blow holes etc. which results in the decrease of the efficiency of system. Therefore the development of reliable technique to detect the flaws in the rotor is strongly needed not only to control quality assurance but to improve its efficiency. In this study, the wide variety of ultrasonic techniques have been applied to detect the flaws in the rotor and then to discuss the detectibility of the flaw and the applicability for NDE tool in the aluminum die-casting rotor.

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A Quality Assurance based on Coding Standards for Communication System (통신 시스템을 위한 코딩 표준 기반 품질 보증)

  • Kang, Sun-Young;Lee, Eun-Seok
    • Proceedings of the Korea Information Processing Society Conference
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    • 2010.11a
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    • pp.203-206
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    • 2010
  • 임베디드 소프트웨어의 소스 코드에 대한 품질 검증은 매우 중요한 사항이다. 이에 다양한 시험을 통해 요구되는 품질 속성을 만족하기 위해 노력한다. 본 연구에서는 이러한 품질 확보 활동의 일환으로 구현 단계에서 진행하는 코드리뷰에 코딩 표준을 적용한 사례를 소개한다. 코딩 표준에 대한 다양한 연구와 도메인 내의 결함 분석을 통해 몇 가지의 코딩 표준을 제안하였으며, 이를 조직에 적용하기 위한 고려사항을 언급하였다. 마지막으로 적용 결과에 대해 분석하여 향후 진행될 방향으로 마무리 지었다.