• 품질경영학회지
• /
• 제47권1호
• /
• pp.187-198
• /
• 2019

Purpose: In this study, a reliability prediction based reliability growth management is suggested especially for the early development phase of a system and the case study of surveillance system is given. Methods: The proposed reliability prediction based reliability growth management procedures consists of 7 Steps. In Step 1, the stages for reliability growth management are classified according to the major design changes. From Step 2 to Step 5, system reliability is predicted based on reliability structures and the predicted reliabilities of subsystems (Level 2) and modules (Level 3). At each stage, by comparing the predicted system reliability with that of the previous stage, the reliability growth of the system is checked in Step 6. In Step 7, when the predicted value of sustem reliability does not satisfy the reliability goal, some design alternatives are considered and suggested to improve the system reliability. Results: The proposed reliability prediction based reliability growth management can be an efficient alternative for managing reliability growth of a system in its early development phase. The case study shows that it is applicable to weapon system such as a surveillance system. Conclusion: In this study, the procedures for a reliability prediction based reliability growth management are proposed to satisfy the reliability goal of the system efficiently. And it is expected that the use of the proposed procedures would reduce, in the test and evaluation phase, the number of corrective actions and its cost as well.

• 한국응용과학기술학회지
• /
• 제28권4호
• /
• pp.508-516
• /
• 2011

Hydrotreated biodiesel(HBD) is paraffinic bio-based liquid, with the chemical structure $C_nH_{2n+2}$, originating from vegetable oil(the process can also be applied to animal fat). The oil or fat is treated in a number of process, the most important being hydrogenation, in order to create a bio-based liquid diesel fuel. During the hydrogenation, oxygen is removed from the triglyceride and converted into water. Propane is formed as a by product and can be combusted and used for energy production. HBD can be used in conventional diesel engines, pure or blended with conventional diesel, due to its similar physical properties to diesel. This study reports the quality characteristics with chemical and physical properties as an alternative diesel fuel. Especially, HBD showed higher cetane value and number than FAME, and it is consisted of $C_{15}$ - $C_{18}$ n-paraffinic compounds. We also describes quality characteristics of HBD blends(2, 5, 10, 20, 30, 40, 50 vol%) in automotive diesel. HBD blends(max. 20 vol%) were the limit by the Korean specification due to poor low temperature characteristics.

• 식품과학과 산업
• /
• 제52권1호
• /
• pp.20-31
• /
• 2019

Sensory perception of food/beverage products is one of the most important quality factors to determine consumer acceptability and thus sensory discrimination methodology has been a vital tool for quality management. Signal detection theory(SDT) and Thurstonian modeling provide the most advanced psychometric approach to modeling various discrimination methods. In these theories, perceptual and cognitive decisional factors are considered so that, a fundamental measure of sensory difference (d') can be computed, independent of test methods used. In this paper, sensory discrimination analysis based on SDT and Thurstonian modeling is introduced for more accurate and systematic applications of sensory and hedonic quality management in industry. Ways to realize the statistical power and relative sensitivity of sensory discrimination methods theorized in SDT and Thurstonian modeling in practice, are also discussed by using a case study of the Nongshim quality management program for drinking water in which SDT A-Not A test methodology was further optimized.

• Journal of Information Technology Applications and Management
• /
• 제21권4호
• /
• pp.65-96
• /
• 2014

To have global competitiveness in newly growing industry, good quality R&D's in convergence technology arerequired. Korean government also started to emphasize the importance of convergence technology as a new engine of growth for the future development. Since 2008, worldwide energy crisis and concerns on low carbon green growth made people focus on the convergence between information technology (IT) and energy technology (ET). However, the R&D performance comparison among the convergence technologies is not well explored so far. Therefore, this study uses Korea's patent citation database to measure the R&D performance of convergence technologies. We adopt technology development cycle, technology spillover analysis, and technology diffusion analysis to see the knowledge flow from R&D industry to others. We find that IT_ET convergence technology generally shows higher R&D performance than other convergence technologies. Contrary to public belief, convergence R&D by big companies has relatively low performance especially measures in technology spillover and technology diffusion. This implies that they might concentrate on delicate Fuel Cell Energy/Environment Technology (FEIT) or Nano Environment/Energy Information Technology (NEIT) rather than general energy information technologies. We also find that Korea's chemical industry may play a crucial role for the growth of other convergence technologies.

• 한국기술혁신학회:학술대회논문집
• /
• 한국기술혁신학회 2004년도 정기총회 및 추계학술대회 논문집
• /
• pp.308-316
• /
• 2004

한국전자통신연구원(이하 ETRI)은 2002년에 국제표준으로 널리 통용되어 많은 분야에서 적용되고 있는 ISO 9001:2000 품질경영시스템 인증을 획득하여 현재까지 유지하여 오고 있다. ETRI의 ISO 9001:2000 품질경영시스템 도입 목적은 대외적으로는 연구개발 경쟁력 향상과 고객만족 증진이고, 대내적으로는 연구개발 업무 수행의 체계적이고 공통된 틀을 제공하는 R&D 표준프로세스의 정립과 이의 지속적으로 개선하기 위한 것이다 이를 통한 연구개발 수행 활동의 효과 성과 효율성을 제고하여 최종적으로는 고객에게 제공되는 연구개발 결과물의 품질을 향상시키는데 있다. 본 논문에서는 ETRI가 ISO 9001:2000 품질경영시스템을 R&D 프로세스 혁신을 위한 기반시스템으로 활용한 접근방법에 대하여 살펴보고, 그를 위해 연구개발 업무에 대하여 구체적으로 정의한 R&D 프로세스 모델 및 그 활용체계에 대하여 간략히 소개하고자 한다.

• 한국IT서비스학회:학술대회논문집
• /
• 한국IT서비스학회 2003년도 춘계학술대회
• /
• pp.215-221
• /
• 2003

In today's rapidly changing business environment, quality of responsiveness to customer requirements for short order cycles and on time delivery is becoming more important and considered as one of critical success factors in supply chain management. Yet despite its importance on reducing transportation cost and improving customer service, little attention has been given to the transportation planning system in Korea SI industry. In this paper, we present development of transportation planning system especially to deal with vehicle routing problem which has the goal to minimize the costs of daily transportation operation and to maximize customer delivery service. The system architecture with other enterprise application is presented and real-world constraints are well incorporated into the system by combining constraints programming and meta heuristics.

• 시스템엔지니어링학술지
• /
• 제5권1호
• /
• pp.49-56
• /
• 2009

This research attempts to acquire technical performance measure information based on identifying the Critical To Quality(CTQ) parameters of user requirement by using Quality Function Deployment(QFD) methodology in the initial phase of a defense R&D project. This results will contribute to the integration of technical progress to the Work Breakdown Structure(WBS) based project performance tracking. It also improve the bridging of systems engineering activities to the project management and the project decision making process.

• 시스템엔지니어링학술지
• /
• 제16권1호
• /
• pp.43-50
• /
• 2020

Many companies around the world are applying CMMI to improve the organization's ability to perform projects, and many others are pushing to obtain CMMI certification as more and more of them are offered as preconditions for participation in projects or supply product. Organizations with high maturity such as CMMI Level 4~5, analyze the accumulated R&D data of the organization and establish the performance management model so that R&D performance is continuously managed. So this paper shows the R&D performance management model made by LIGNex1 which is certificated with CMMI Level 5 organization and the case applied to the project, including its effectiveness.

• 보건교육건강증진학회지
• /
• 제27권4호
• /
• pp.141-152
• /
• 2010

Objectives: This study was conducted to estimate the health-related quality of life using EQ5-D by socio-demographic characteristics and mental health among Seoul citizens for developing health promotion programs. Methods: The study subjects using cluster-stratified sampling method were 1234 adults over 19 years old from 17 dong, S-Ku in Seoul City. A cross-sectional study with face-to-face interview was used to collect data. A questionnaire measuring socio-demographic variables, Symptom Checklist-90-Revised (SCL-90-R) and Euroqol EQ-5D instrument. The Difference on the EQ-5D index among groups were tested with Mann-Whitney U test and Kruskal Wallis test. Results: The mean EQ-5D index for all subjects was 0.946(${\pm}0.105$). The EQ-5D index were significantly different by sex, age, marital status, eduction level and income. The EQ5-D indexes among clinical mental health groups were the lowest scores and significantly different from other groups. Conclusion: The findings suggest that the future intervention of health promotion programs should be carefully designed and tailored by socio-demographic variables. Especially, the mental health programs need to be developed.

• 시스템엔지니어링학술지
• /
• 제12권2호
• /
• pp.19-27
• /
• 2016

Many countries concentrated on the space developments to enhance the national security and the people's quality of life. A space launch vehicle for accessing the space is a typical large complex system that is composed of the high-technology like high-performance, high-reliability, superhigh-pressure, etc. The project developing large complex system like space launcher is mostly conducted in the uncertain environment. To achieve a goal of the project, its success probability should be enhanced consistently by reducing its uncertainty during the life cycle: it's possible to reduce the project's uncertainty by performing the risk management (RM) that is a method for identifying and tracing potential risk factors in order to eliminate the risks of the project. In this paper, we introduce the risk management (RM) process applied for a Space Launch Vehicle R&D Project.