• 한국한의학연구원논문집
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• 제12권2호통권17호
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• pp.85-92
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• 2006

Pulse is one of the basic diagnostic information of TKM(Traditional Korean Medicine). To quantify and standardize pulse diagnosis, we had collected an amount of clinical data from May 2005 by using newly developed pulse analyzer. But there were many noises in pulse wave according to measuring method, environment, operator and condition of patient. So some data can’t be included for analyzing diagnosis. To reduce noises from measuring pulse and to collect reliable pulse wave data, we made the process map of measuring method and applied six sigma project. With this we can improved the method of measuring pulse wave in collecting clinical data. The project follows a disciplined process of five macro phases: define, measure, analyze, improve and control (DMAIC). A process map and C-E diagram are used to identify process input and output variables. The major input variables are selected by using C&E matrix, and process map is developed by analyzing input variables. And the optimum process conditions are going to be controled to avoid in increasing loss of collecting pulse wave data.

• 품질경영학회지
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• 제38권3호
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• pp.340-353
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• 2010

Properly designed and well-executed services enable e-commerce companies to capture the unique needs and preferences of customers, help them build customer loyalty, and thereby, strengthen their competitiveness in the marketplace. An object of this study is the new open-market company and it has only 3 percent of the market share. Therefore, it is needed to raise the market share by improving the service qualities. This article presents a six sigma project for service quality improvement in the open-market company. This study was carried out based on five steps of DMAIC which is six sigma technique. First, a defect rate was defined as unsatisfaction rate. In addition, 50-people data was analyzed and it was shown that the defect level was 2.5 sigma level. In this study, in order to raise the sigma level, novel eight action items were determined based on SIPOC, FDPM, cause and effect diagram, matrix chart, Pareto chart and statistical analysis.

• 한국산업융합학회 논문집
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• 제13권4호
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• pp.219-225
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• 2010

A structure of line for producing products is variously changing to be automatic and one-person Cell-Line considering the physical burden for workers in manufacturing industry of electronic goods. However, workers tend to still accuse Work-related Musculoskeletal Disorders (including shoulder, waist, hand, wrist, leg etc.) as a simply repeated work by accelerating of the production speed for productivity improvement in the assembly line. Thus manufacturing engineers in charge of changing and set up newly for an assembly line are necessary to the construct of the guideline on human engineering. Especially. There is no standardized engineering-guide and it is difficult to create the exact work environment because the risk factor analysis and the improvement for assembly line are executed once a year on the current situation. I'd like to reduce the physical burden on workers through the effective improvement of processing by the guideline on working environment fit for a characteristic on manufacturing process when the process is changed or newly installed.

• 대한안전경영과학회지
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• 제15권1호
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• pp.283-292
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• 2013

This paper aims to propose a new steps of hypothesis testing using analysis process and improvement process in the six sigma DMAIC. The six sigma implementation models proposed in this paper consist of six steps. The first step is to establish a research hypothesis by specification directionality and FBP(Falsibility By Popper). The second step is to translate the research hypothesis such as RHAT(Research Hypothesis Absent Type) and RHPT(Research Hypothesis Present Type) into statistical hypothesis such as $H_0$(Null Hypothesis) and $H_1$(Alternative Hypothesis). The third step is to implement statistical hypothesis testing by PBC(Proof By Contradiction) and proper sample size. The fourth step is to interpret the result of statistical hypothesis test. The fifth step is to establish the best conditions of product and process conditions by experimental optimization and interval estimation. The sixth step is to draw a conclusion by considering practical significance and statistical significance. Important for both quality practitioners and academicians, case analysis on six sigma projects with implementation guidelines are provided.

• 대한안전경영과학회지
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• 제8권3호
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• pp.27-36
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• 2006

The port, differently from general working place, is a closed area to execute security, customs, and quarantine procedures. The loading and unloading is being done differently by cargoes, ships, berths, and equipments. To load and unload a lot of equipments and different types of labor are required, in which work flow is very complicated. As above mentioned the port is very unique and deteriorated working place including danger. The purpose of this thesis is to propose ways to analyze and establish the preventive measure for cargo handling accidents in port. We have collected 923 accidents happened at Incheon Port during the period from 1994 to 2003. And to analyze and establish the preventive measure we have employed an advanced 6sigma DMAIC technology presently in spotlight as the best tool for management innovation. For the purpose of effective safety management of cargo handling in port, this thesis will help to revise and establish the law, system, standard, and standard working manual with respect to the port loading and unloading system. Now frequency of cargo handling accidents in port is highest for the second time among all industries, so we proposed the new safety management system to substitute port safety committee and to take full charge of safety in Ministry of Maritime Affairs and Fisheries.

• 산업경영시스템학회지
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• 제42권4호
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• pp.165-172
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• 2019

Innovation activities represented by Six Sigma (6σ) led to improvements not only in manufacturing industries but also in various business fields. In the aviation industry, Six Sigma has been used as a tool of innovation since the beginning of 2000, and it has developed into a comprehensive form of innovation activity that includes various improvement tools. In this study, the innovation activities in K company that is a representative company of aviation industry are summarized in the last 10 years, and the effectiveness of the innovation tools and the performance of the tasks are also analyzed. The results of 2,091 projects over the past decade have been analyzed from various perspectives. First, we found out the tools that were used frequently at each DMAIC step, showed their frequency, and analyzed the evaluation results for the project. The project was evaluated from grade 1 (highest level) to grade 7 (lowest level) with an average grade of 4.1 for the overall project. The evaluation grades of the projects were compared and analyzed in terms of the qualifications of the leader, the roadmap for the implementation of the project, the financial effect, the size of the financial effect, the business classification, and the project execution period. These results may suggest new perspectives for companies considering or adopting innovation programs.

• 대한영양사협회학술지
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• 제13권4호
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• pp.331-344
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• 2007

This study was performed to improve the hospital food service in quality and customer satisfaction by using 6-sigma strategy which was processed by DMAIC methods. The research procedure was as follows; analyzing the main causes of customer dissatisfaction of food service by using numerical method, and then finding out the standardized problem solving methods, and finally reforming food service process. The effectiveness of 6-sigma activity was measured by ‘food service quality index’, ‘customer satisfaction index’ and ‘total food service satisfaction index’. Food service quality index was calculated by adding grade of soup temperature, food service, delivery time, and setting accuracy. Statistical data analyses were completed by using the Minitab Ver. 14. By performing 6 sigma activity, food service quality index was increased from 67 to 79 points (p<0.05) and customer satisfaction index also rise from 73 to 79points (p<0.05). Satisfaction of meals’ taste, diverse menu, food setting accuracy, remove of food service, overall food service were significantly improved(p<0.05). The results of capability analysis in food service quality index, customer satisfaction index, and total food service satisfaction index were improved 2.11$\sigma$ to 2.49$\sigma$, 1.88$\sigma$ to 2.43$\sigma$, and 2.04$\sigma$ to 2.47$\sigma$ respectively (p<0.05). Therefore this study showed that subjective food service improving process could be measured by objective numerical value which might be used for financial value in hospital management.

• 융합보안논문지
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• 제7권2호
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• pp.27-37
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• 2007

기업 경영환경의 급격한 변화로 과거 공급자 중심의 경영패러다임은 고객 및 프로세스 중심의 경영패러다임으로 변화하고 있으며 이러한 변화에 민첩하고 유연하게 대응하며 지속적으로 변화하는 기업만이 시장에서 생존할 수 있는 시대가 되었다. 기업은 통합 생산성을 고려하여 프로세스를 재설계하고 내부업무를 통합하는 등 비즈니스 프로세스를 통합하여 경영의 효율성을 극대화하기 위해 많은 투자를 한다. 이러한 노력은 기업운영차원에서 반드시 필요하지만 오늘날 빠르게 변화하는 시장과 고객의 요구에 대처하면서 기업의 전략과 연계하여 운영차원으로 적용하지는 못하고 있다. 효율적인 경영을 통해 얻을 수 있는 이점에는 한계가 있으며 기업내부경영의 효율화가 극대화되어도 치열한 경영환경 하에서 경쟁우위를 차지할 수 있는 요소가 되지는 못한다. 따라서 기업은 시장에서 살아남고 경쟁우위를 유지하기 위해 새로운 가치를 창출할 수 있는 전략을 도출하여 빠르게 프로세스에 적용하고 지속적으로 관리해야 한다.

• 한국정보과학회논문지:소프트웨어및응용
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• 제35권4호
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• pp.234-244
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• 2008

식스 시그마는 80년대 중반에 처음 등장한 이래 각종 제조업, 금융이나 공공기관 같은 서비스업 등의 다양한 산업 분야에서 활용되어 오면서 무수한 성공사례를 롱해 그 능력과 가치를 입증해 온 품질 혁신 활동이다. 최근에는 소프트웨어 개발 및 품질 보증에서도 식스 시그마를 활용하기 위한 연구가 활발히 이루어지고 있다. 그러나 식스 시그마의 활발한 도입 및 활용에도 불구하고 식스 시그마 프로젝트의 수행을 지원하는 소프트웨어 도구는 많지 않다. 이러한 이유로 정량적인 식스 시그마 프로젝트 관리에 대한 필요성이 제기되게 되었고, 식스 시그마 프로젝트의 전체 프로세스에 걸친 통합적인 식스 시그마 프로젝트에 대한 측정 및 분석, 측정 및 분석결과에 대한 저장 및 리포팅 기능을 지원하는 프레임워크나 도구가 필요하다. 본 논문에서는 이러한 기능들을 지원하는 정량적인 식스 시그마 프로젝트 관리 프레임워크를 제안하고, 이 프레임워크에 기반하여 개발이 진행 중인 식스 시그마 프로젝트 지원도구에 대해 소개한다. 이를 통해 식스 시그마 프로젝트를 수행하는 조직이나 사용자는 정량적인 프레임워크와 도구의 사용에 바탕을 둔 식스 시그마 프로젝트의 관리를 통해 식스 시그마 프로젝트의 정량화, 체계화, 통합화라는 이득을 얻을 수 있을 것이다.

• 한국산학기술학회논문지
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• 제22권1호
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• pp.74-80
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• 2021

본 연구는 최근 전력화가 완료되어 양산이 진행 중인 K5 방독면에 대한 공정품질 수준을 평가하기 위하여 통계적 공정관리 기법을 활용하여 양산 단계 및 로트 별 분석을 수행하였다. 렌즈의 접착강도는 K5방독면의 기술적 요구사항 중 유일하게 생산 공정 간 평가하는 항목으로, 초도 및 2차 양산간 획득된 고무안면부와 렌즈 사이의 접착정도를 측정한 시험결과를 바탕으로 기술통계 및 통계적 공정관리 기법을 적용하여 분석하였다. 기술통계 분석결과에 따르면 초도 양산 대비 2차 양산 공정에 대한 결과가 더 좋음을 나타내고 있었다. 통계적 공정관리 기법인 관리도 분석과 공정능력지수에 대한 양산 단계 별 분석결과, 공정품질 수준 또한 양산이 진행됨에 따라 향상되고 있음을 확인 할 수 있었다. 이는 공정이 점차 안정화 되고 업무 숙련도에 의해 개선이 되고 있음을 보여주고 있었다. 이에 초도 및 2차 양산 간 획득된 성능시험 결과를 바탕으로 향후 3차 양산을 위한 기초자료로서 활용하고자 한다. 더불어 린6시그마의 DMAIC[Define(정의)-Measure(측정)-Analyze(분석)-Improve(개선)-Control(관리)] 방법론을 통해서 K5방독면의 품질향상 등의 목표달성을 수행할 예정이다.