• 한국IT서비스학회:학술대회논문집
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• 2005.11a
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• pp.91-98
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• 2005

BPR은 1990년대 초에 제안되어 많은 기업의 경영 혁신 도구로 선택되어 왔다. 그러나, 대다수의 기업이 성공적인 결과를 보여주고 있지 못하고 있는 실정이며 Champy는 BPR의 실패 원인으로 '경영 패러다임의 변화 없는 경영 혁신'을 들고 있다. 본 논문에서는 BPR의 한계를 극복하고 프로세스 효율성을 극대화할 수 있는 경영 혁신 기법으로 BPO(Business Process Outsourcing)를 제안하고, BPO 품질 관리를 위해 전략적 6 시그마의 DMAIC를 활용한 SLA(Service Level Agreement) 적용 방법론을 제안하고 있다. 아웃소싱 품질을 관리하기 위한 근본적인 요인을 정의하고 이에 대한 산포 관리와 목표 수준 관리의 2단계를 반복함으로써 아웃소싱 품질을 높일 수 있을 뿐만 아니라 궁극적으로는 기업의 전체 프로세스 효율성도 극대화할 수 있을 것이다.

• Annual Conference of KIPS
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• 2007.11a
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• pp.1222-1225
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• 2007

보안수준 평가 및 개선에 있어서 온라인 웹사이트 응용프로그램의 경우 측정 기준 설정과 보안 수준 표시에 많은 어려운 점이 있다. 이에 모토롤라부터 도입한 경영혁신 도구로서의 6 시그마 수준 표현 및 개선 기법을 웹사이트 보안수준 평가에 적용할 수 있도록, WASC(Web Application Security Consortium)에서 제공하고 있는 웹 애플리케이션 보안 평가 체크리스트를 사용하여 Bottom-Up 방식으로 웹 사이트에 대한 실제 침해 시도의 결과를 측정, 이를 보안수준 측정 및 개선에 활용할 수 있는 방안을 제시한다.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.3
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• pp.44-53
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• 2008

In this paper, we present the design of delta-sigma modulation-based class-D amplifier for driving headphones in portable audio applications. The presented class-D amplifier generates PWM(pulse width modulation) signals using a single-bit fourth-order high-performance delta-sigma modulator. To achieve a high SNR(signal-to-noise ratio) and ensure system stability, the locations of the modulator loop filter poles and zeros are optimized and thoroughly simulated. The test chip is fabricated using a standard $0.18{\mu}m$ CMOS process. The active area of the chip is $1.6mm^2$. It operates for the signal bandwidth from 20Hz to 20kHz. The measured THD+N(total harmonic distortion plus noise) at the $32{\Omega}$ load terminal is less than 0.03% from a 3V power supply.

• Journal of the Korean Data and Information Science Society
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• v.24 no.6
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• pp.1127-1139
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• 2013

In the realization of obtained image by various visual equipments, the addition of noise to the original image is a common phenomenon and the occurrence of the noise is practically impossible to prevent completely. Thus, the noise detection and reduction is an important foundational purpose. In this study, we detect the orientation about feature of images and estimate the level of noise variance based on the measurement of the relative proportion of the noise. Also, we apply the estimated level of noise to the sigma filter on noise reduction algorithm. And using the orientation about feature of images by weighted value, we propose the effective algorithm to eliminate noise. As a result, the proposed statistical noise reduction methodology provides significantly improved results over the usual sigma filtering and regardless of the estimated level of the noise variance.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.44 no.6 s.360
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• pp.50-59
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• 2007

[ $0.18-{\mu}m$ ] CMOS 1.2-V 2nd-order ${\Sigma}{\Delta}$ modulator with full-feedforward topology is designed. Using full-feedforward topology makes op-amp performance requirements much less stringent, therefore it has been adopted as a good candidate for low-voltage low-power applications throughout the world. Also, ${\Sigma}{\Delta}$ modulator is designed with top-down design approach, therefore various nonideal effects of op-amp are modeled in this paper.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.2
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• pp.224-230
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• 2006

As business competition gets together, there is much pressure on product development service organizations and manufacturing to become more productive and efficient. Product developers need to create innovative products in less time, even though the products may be very complex. To get this purpose, Six sigma methodology can be used. Six sigma is a strategic approach that works across all processes, all products, and all industries. The purpose of this paper is to develop the innovation strategy for shortening the lead time of the new product using six sigma method.

• Journal of KIISE:Software and Applications
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• v.33 no.11
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• pp.923-935
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• 2006

As the knowledge-based society has been constructed, the size of work process that has to be done grows bigger and the amount of the information that has to be analyzed increases. So each company is trying to construct more conformable process models in business model. In order to support the process construction of companies practically, in this paper tools of Six Sigma is applied to process definition and tools of PSP is applied schedule management. And to use the proposed tools efficiently, the procedure of process definition and schedule management are suggested. The goal of the proposed method is to achieve the process aim within the Time-To-Market by applying the process management of organizations and persons. And the goal of individuals is to improve personal process with the collected data.

• Proceedings of the Safety Management and Science Conference
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• 2005.05a
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• pp.199-212
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• 2005

Many countries of the world is driving forward development of large-scale hub port. They are now pushing ahead with setting up of effective marketing strategies to survive in keen competitions of the 21st century port industry. The port is of ever increasing importance for the bridge connecting sea and road transportation in handling international cargoes. The port, differently from general working places, is a closed area required for security, customs, and quarantine procedures. The loading and unloading is being done differently by ports, cargoes, and ships. To do loading and unloading, a lot of equipment and different types of labor are required, which flow is complicated and safe management is essential. As above mentioned the port is very unique and very deteriorated working place in its working environment. The purpose of this study is to propose ways to reduce and prevent from port accidents. As first step to do this, we have collected 923 accidents happened at Incheon Port during the period of 1994 to 2003. We have thoroughly analyzed characteristics, harmfulness, and risk of the loading/unloading they have done, as well as the accident frequency and relationship between the accidents. As second step to further analyze, We have employed DMAIC technology, an advanced process of 6 sigma presently in spotlight as the best program for management innovation. This analysis results in recognition of important accident characteristics, causes and effects analysis, critical causes of accident, and suggestions to decrease accidents.

• Journal of Korean Society for Quality Management
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• v.31 no.3
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• pp.172-184
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• 2003

Many companies in Korea are paying close attention to Six Sigma to get better business results. And there are numerous success stories on the use of statistical methods in solving problems, improving processes and cutting costs. However, there are many cases in which statistical methods are misused or inappropriately applied. In this paper, the pitfalls to avoid in using statistical methods are discussed. Also the role of statistics in Six Sigma is examined.

• 한국경영정보학회:학술대회논문집
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• 2008.06a
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• pp.238-244
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• 2008

본 연구는 급변하는 경영환경에서 서비스 기업들이 빠르고 창의적인 혁신활동으로 기업의 문제를 해결을 지원하기 위한 문제해결 정보시스템을 설계 하고자 하는 연구이다. 이를 위해 창의적 혁신 기법인 TRIZ 혁신 기법과 고객관점의 최적화 기법인 6시그마 기법을 융합하여 CTQ를 중심으로 하는 3단계 문제해결 Logic과 이를 지원하는 정보 시스템 설계에 대한 Framework 및 속성들을 제시하였다. 또한 서비스 기업의 일반적 사례 적용을 통해 문제해결정보시스템의 활용 가능성을 확인 하였고, 이에 대한 문제해결 시스템 적용을 통해 서비스 기업들의 경영혁신을 고도화하여, 기업의 경쟁력을 향상할 수 있다는 점을 제시해 주고 있다.