• Journal of Korean Society for Quality Management
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• v.29 no.3
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• pp.166-176
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• 2001

This paper considers a six sigma project for reducing the color variation of the monitor materials in a chemical plant. The project follows a disciplined process of five macro phases: define, measure, analyze, improve, and control (DMAIC). A process map is used to identify process input variables. Three key process input variables are selected by using an input variable evaluation table; a melting pressure, a coloring agent, and a DP color variation. DOE is utilized for finding the optimal process conditions of the three key process input variables. The sigma level of defects rate becomes a 4.58 from a 2.0 at the beginning of the project.

• Journal of Korean Society for Quality Management
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• v.34 no.1
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• pp.1-12
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• 2006

This paper presents a six sigma project for improving gate painting quality in a medium-sized automotive part company. The project follows a disciplined process of five macro phases: Define, Measure, Analyze, Improve, and Control. A CTQ(critical to quality) is determined based on COPQ(cost of poor quality) analysis, and a process map is utilized for identifying process input variables. Three KPIV s(key process input variable) are selected; Painting Temperature, Painting Quantity, and Painting Viscosity, and DOE(design of experiments) is utilized for finding the optimal process conditions for three KPIVs. MINITAB software is used for data analyses and DOE. The sigma level of defects rate has improved from 2.93 to 3.66.

• Proceedings of the Safety Management and Science Conference
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• 2012.04a
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• pp.623-638
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• 2012

Since six sigma program was first introduced in late 1990's, it has been evolved in Korea. The number of six sigma adopting company are getting increased and diversify manufacturing, service, government. In these days, the rapid innovation of internet technology change the media industry's game rule. This paper is concerned with a six sigma applications to internet media portal service company. The main focus of this study is to introduce an empirical study on the implementation of DMAIC procedures for internet media portal service company.

• Journal of the Korea Safety Management & Science
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• v.10 no.4
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• pp.219-227
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• 2008

Since six sigma program was first introduced in late 1990's, it has been evolved in Korea. The number of six sigma adopting company are getting increased and diversify manufacturing, service, government. In these days, the rapid innovation of internet technology change the media industry's game rule. This paper is concerned with a six sigma applications to internet media portal service company. The main focus of this study is to introduce an empirical study on the implementation of DMAIC procedures for internet media portal service company.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2000.05a
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• pp.260-277
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• 2000

최근 미국의 모토롤라(주)에서 시작된 6 시그마(Six Sigma) 경영이 우리나라의 기업들에게 큰 관심의 대상이 되고 있다. 이 논문은 6 시그마 중에서 설계 및 개발분야에 사용되는 6$\sigma$ 설계(Design for Six Sigma: DFSS)에 관하여 고찰하여 보는 논문이다. 6 시그마에 관한 많은 이론이 나와 있으나 아직 DFSS에 관해서는 매우 미약한 편이다. 이 논문에서는 먼저 DFSS의 정의, DFSS 프로세스의 단계, DFSS의 로드맵 등을 먼저 다루고, 다음으로 DFSS에서 사용되는 각종의 과학적 관리기법들(품질기능전개, Scorecard, FMEA, TRIZ, 다구찌설계 등)에 대하여 간단히 기술하기로 한다. 마지막으로 DFSS의 실무적용방법을 제안한다.

• Proceedings of the KWS Conference
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• 2003.11a
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• pp.91-92
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• 2003

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.442-456
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• 2004

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.8
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• pp.2068-2077
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• 2009

While six sigma project management systems have been widely used as a knowledge management systems, no one has proposed an empirical explanation for impacts of project management systems on project performance. This study proposes a structural equation model of the project management system that relates learning/growth, internal growth, customer performance, and financial effects based on six sigma project performance. The relationships are investigated using data collected from a sample of green and black belts. The results indicate that there are a causal relationship with use of project management and learning/growth and internal process, internal process and customer performance, and customer and financial performance. However, there is no relationship between internal process and financial effects. The results suggest that six sigma project system could effectively be implemented as a knowledge management system to improve six sigma performance of green an black belts. This study also compares index of SEM's model fit of research model and that of alternative models for further analysis. The result shows that index of research model of index is better than that of alternative model.

• Journal of the Korea Convergence Society
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• v.10 no.11
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• pp.149-159
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• 2019

Six sigma is an innovative management movement which provides improved business process by adapting the paradigm and the trend of market and customers. Suitable selection of six sigma project could highly reduce the costs, improve the quality, and enhance the customer satisfaction. There are existing studies on the selection of Six Sigma projects, but few studies have been conducted to select the correct project under an incomplete information environment. The purpose of this study is to propose the application of integrated MCDM techniques for correct project selection under incomplete information. The project selection process of six sigma involves four steps as follows: 1) determination of project selection criteria 2) calculation of relative importance of team member's competencies 3) assessment with project preference scale 4) finalization of ranking the projects. This study proposes the combination methods by applying group fuzzy Analytical Hierarchy Process (AHP), an easy defuzzified number of Trapezoidal Fuzzy Number (TrFN) and Grey Relational Analysis (GRA). Both of the weight of project selection criteria and the relative importance of team member's competencies can be evaluated by group fuzzy AHP. Project preferences are assessed by easy defuzzified scale of TrFN in case of incomplete information.)

• Journal of Korean Society for Quality Management
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• v.32 no.1
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• pp.1-20
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• 2004

Six sigma has been the most influential management innovation program since 1996 in Korea. As a result of successful implementation of 6 sigma, there have been a number of dramatic quality improvement cases. However, no empirical study of 6 sigma implementation study has done especially in the service industry of Korea. This article reviews status of finance companies which implemented 6 sigma programs in Korea and then demonstrates the relationship between 6 sigma problem solving tools such as analysis of variance and graph techniques, etc and project success and operational performance. Customer survey tools, process analysis, and documentation tool are identified as influential tools on project success. Tools of measure steps, customer survey tools, and documentation tool are found as influential tools on operational performance.