• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2004년도 추계학술대회
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• pp.69-79
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• 2004

Process capability indices are widely used in industries and quality assurance system. When designing the parameter on the multiple quality characteristics, there has been a study for optimization of problems, but there has been few former study on the possible conflicting phenomena in considertion of the correlations among the characteristics. To solve the issue on the optimal design for multiple quality characteristics, the study propose the expected loss function with cross-product terms among the characteristics and derived range of the coefficients of terms. Therefore, the analysis have to be required a multivariate statistical technique. This paper introduces to multivariate capability indices and then selects a multivariate process capability index incorporated both the process variation and the process deviation from target among these indices under the multivariate normal distribution. We propose a new multivariate capability index $MC_{pm}^{++}$ using quality loss function instead of the process variation and this index is compared with the proposed indices when quality characteristics are independent and dependent of each other.

• 한국환경과학회지
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• 제22권8호
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• pp.1063-1072
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• 2013

To overcome the ecosystem-crisis of resource depletion and climate change, we should maintain and develop a 'Sustainability' of our society. 'After-market' is defined like this : any market where customers who buy one product or service are likely to buy a related follow-on product. This is related to a automotive, electric and electronic, and remanufacturing industry. 'After-market' will be helpful for reuse and recycling of resources aspects, cost and economic efficiency, low-carbon, climate protection, and new industries and job creation effects, To promote 'After-Market', we need to guarantee the quality of products. In this regard, we refer and introduce a new standard, for example, BS8887, PAS141 and ISO20245 etc. In order to promote 'After-Market', first of all, product quality assurance and safety must be demonstrated in the process of reuse. Second, many aspects of a device that protects the rights of consumers to be provided. And third, the related laws and standards should be reviewed. Finally, original manufacturer's awareness for environmental protection and resource conservation and government's institutional support are needed.

• 품질경영학회지
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• 제23권4호
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• pp.74-89
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• 1995

In recent years, the safety of customers and the demand for rights to be protected from the risk have become stronger than ever day by day, and the function concerning product liability(PL) and quality assurance(QA) has been emphasized. Basically these functions can be obtained by inspection and there is the single rectifying sampling inspection for attribute (KSA-3105) as an existing method. But we can not say this method is good enough because of limitations in the range of applications and the approximate design of inspection methods which can not meet the rapidity and accuracy of quality information transfer according to the maturity of information period. Therefore, in this paper, a new algorithm is developed which can design the accurate inspection method by using the linear cost function that has not been considered in the existing inspection methods. Also in addition to this, a optimal rectifying sampling inspection plan, contributing to minimize the total costs, can be developed by programming the algorithm developed in this study and it can be applied to any field having many processes almost limitlessly.

• 한국기계가공학회지
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• 제7권3호
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• pp.75-80
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• 2008

The progressive die performs a work of sheet metal processes with a piercing, notching, embossing, bending, drawing, cut-off etc. in many kinds of pressing. Now a days, these processes have been evaluated as a advanced tooling method to increase the productivity and high quality assurance. The first step analyzing of die design is production part review, then the arrangement drawing of product design and strip process layout design should be done as a next steps with a FEM simulation for its problem solution. After upper procedure were peformed, it was started to make the die, then tryout and its revision of the die and product quality, safety, productivity etc. were done continually. For the all of these process, we mobilized the theory and practice of sheet metal forming, die structure, the function and activity of die components, and the others of die machining, die material, heat treatment and know‐how so on. In this study the features of representative are production part analyzing through the FEM simulation of bending area with a considering spring back problem by DEFORM.

• 통상정보연구
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• 제11권3호
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• pp.239-262
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• 2009

This study shed light on the status of Korean Kimchi industry in overseas markets and presented methods for promoting Kimchi industry of Gwangju Jeonnam metropolitan city and stimulating the export of Kimchi produced in Gwangju Jeonnam, a city that has come to the fore as the center of Kimchi industry, which aimed to explore the ways of ratcheting up competitiveness of Kimchi industry in the global market as Kimchi has become more likely to be globalized amid the recent "Korea Trend" boom and the growing consumption of fermented food. Therefore, methods for promoting Kimchi industry and stimulating the export of Kimchi should be explored to ensure the promotion of Kimchi industry and the stimulation of the export of Kimchi, ultimately restoring the status of Korea as the home of Kimchi, in consideration of the great spillover effect on the regional economy, through a series of measures such as the clusterization of Kimchi industry, expansion of cultural experience projects related to Kimchi for the globalization and the increased consumption of Kimchi, government support to increase Kimchi companies in size and achieve the modernization of Kimchi companies, introduction of Kimchi KS audit system and quality certification system, development of new product targeting global market and making Kimchi a high-end product, expansion of export, support of export market diversification, assurance of safety and price competitiveness of Kimchi, differentiated production and marketing strategy by means of technological research, and others.

• 대한안전경영과학회지
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• 제21권4호
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• pp.67-74
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• 2019

Visual inspection is regarded as one of the critical activities for quality control in a manufacturing company. it is thus important to improve the performance of detecting a defective part or product. There are three probable working modes for visual inspection: fully automatic (by automatic machines), fully manual (by human operators), and semi-automatic (by collaboration between human operators and automatic machines). Most of the current studies on visual inspection have been focused on the improvement of automatic detection performance by developing a better automatic machine using computer vision technologies. However, there are still a range of situations where human operators should conduct visual inspection with/without automatic machines. In this situation, human operators'performance of visual inspection is significant to the successful quality control. However, visual inspection of components assembled into a mobile camera module belongs to those situations. This study aims to investigate human performance issues in visual inspection of the components, paying more attention to human errors. For this, Abstraction Hierarchy-based work domain modeling method was applied to examine a range of direct or indirect factors related to human errors and their relationships in the visual inspection of the components. Although this study was conducted in the context of manufacturing mobile camera modules, the proposed method would be easily generalized into other industries.

• 융합보안논문지
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• 제3권1호
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• pp.23-30
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• 2003

IT 산업이 급속히 발전하면서 정보보호와 관련된 문제가 중요한 고려 사항으로 대두되고 있다. 이러한 문제 해결의 일환으로 정보보호제품에 대한 수요가 증가하고 있으며, 또한 이들 정보보호제품의 안전 신뢰성이 중요한 이슈로 부각되고 있다. 정보보호제품에 대한 보안성 평가가 이미 시행되고 있지만, 보안성 평가에는 비교적 많은 시간이 소요되므로 개발자가 평가 과정을 거쳐 적시에 제품을 시장에 출시하는 데에는 어려움이 따른다. 본 논문에서는 정보보호제품 개발 프로세스를 공통평가 기준에서 요구하는 수준으로 개선하도록 함으로써, 제품 평가 준비 및 평가에 소요되는 비용과 시간을 경감시키고 평가의 효율성을 향상시킬 수 있는 방안을 모색하여 보고자 한다.

• Journal of Biosystems Engineering
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• 제40권4호
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• pp.394-408
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• 2015

Spectroscopy is an emerging technology for the quality assessment of pharmaceutical samples, from tablet manufacturing to final quality assurance. The traditional methods for the quality management of pharmaceutical tablets are time consuming and destructive, while spectroscopic techniques allow rapid analysis in a non-destructive manner. The advantage of spectroscopy is that it collects both spatial and spectral information (called hyperspectral imaging), which is useful for the chemical imaging of pharmaceutical samples. These chemical images provide both qualitative and quantitative information on tablet samples. In the pharmaceutics, spectroscopic techniques are used for a variety of applications, such as analysis of the homogeneity of powder samples as well as determination of particle size, product composition, and the concentration, uniformity, and distribution of the active pharmaceutical ingredient in solid tablets. This review paper presents an introduction to the applications of various spectroscopic techniques such as hyperspectroscopy and vibrational spectroscopies (Raman spectroscopy, FT-NIR, and IR spectroscopy) for the quality and safety assessment of pharmaceutical solid dosage forms. In addition, various chemometric techniques that are highly essential for analyzing the spectroscopic data of pharmaceutical samples are also reviewed.

• 대한방사선기술학회지:방사선기술과학
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• 제33권4호
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• pp.387-394
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• 2010

보건의료 분야에서 방사선은 의료기기 등의 멸균을 목적으로 빠르게 기존 방법을 대체하고 있으며 국제적으로, 정립된 엄격한 품질기준을 적용하고 있다. 방사선 멸균의 품질관리는 조사된 제품의 흡수선량이 요구 조건 및 기준에 부합하고 있음을 보증하는 것인데, $Co^{60}$ 동위원소를 이용하는 감마선 조사와는 달리 기계 전기적 방법에 따른 전자빔 조사는 더욱 많은 공정인자에 대해 기술적인 접근 방법이 필요하다. 국내에서는 2000년대 초반부터 전자빔 가속기의 보급이 시작되어 연구 및 산업분야에 이용되고 있으나 국제적 품질체계에 부합한 흡수선량의 품질에 관련된 연구는 매우 미흡한 실정이다. 서울방사선서비스는 2008년 10 MeV, 8 kW 사양의 대단위 전자빔 조사시설을 설치, 운영하기 시작하였는데, 전자빔 가속기, 제품운송장치, 안전장치, 기록관리 및 하위 구성장치가 통합시스템을 구성하여 우수제조기준에서 요구하는 공정품질 및 제품추적이 가능하도록 설계되었다. EN ISO11137로 대표되는 국제 표준의 이행을 위해서는 표준이 의도하는 바를 정확히 이해하고 장치의 설계기준부터 운영단계 별로 요구되는 품질시험을 정해진 절차 및 기준에 부합하도록 수행하여야 한다. 본 연구에 사용된 조사시설의 설계 시방을 제시하고 이를 구현하는데 필요한 핵심 장치의 설계 기준 및 특징에 대해 소개하였다. 또한 흡수선량 품질보증이라는 목적을 달성하기 위해 다양한 공정인자에 대한 품질시험결과를 제시하고 제시된 기준과 비교, 평가하였다.

• 설비공학논문집
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• 제25권1호
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• pp.7-13
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• 2013

Bio Clean Room(BCR) and pharmaceutical product manufacturing facilities require careful assessment of many factors, including HVAC, controls, room finishes, process equipment, room operations, and utilities. Flow of equipment, personnel, and product must also be considered along with system flexibility, redundancy, and maintenance shutdown strategies. It is important to involve designers, operators, commissioning staff, quality control, maintenance, constructors, validation personnel, and the production representative during the conceptual stage of design. Critical variables for room environment and types of controls vary greatly with the clean space's intended purpose. It is particularly important to determine critical parameters with quality assurance to set limits and safety factors for temperature, humidity, room pressure, and other control requirements. In this paper, oxygen cluster ion equipment was utilized in order to enhance the indoor air quality and to prevent the airborne infection of ward in hospital. Moreover, the performance test of the equipment was also performed in order to develop the optimal sterilization system of BCR using the equipment.