• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2010년도 춘계학술대회
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• pp.10-15
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• 2010

1996년 국내 6시그마 활동이 도입된 이후 제조업, 서비스업, 대기업, 중소기업, 공공기관등 모든 부문에서 활발히 추진되어 괄목할 만한 개선 성과를 이루었으나, 국방군수 분야인 정비분야에서는 그 활동이 지지부진 하였다. 이에 국방 군수 효율화 운동의 일환으로 2009년 육군종합정비창에서 시범적으로 실시한 6시그마 도입활동을 소개하고 보다 발전적인 방향을 모색함으로써 국방 군수경영 혁신에 기여 하고자 한다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2012년도 춘계학술대회 논문집
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• pp.214-216
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• 2012

This paper relates to the automotive silencers reduce noise generated from the actual vehicle for the activity is based on was worth. To do this, the noise from cars to distinguish them by category, characteristics of turbo charger was designed to reduce noise. In order for the design of acoustic modeling using line dynamics, was analyzed using In house & the commercial software programs. Silencers have about several basic elements. Expand, collapse, perforated plate, and the combination are the basic reactive or dissipative elements. Finally, DFSS(design for six sigma) method was designed. and it was verified in vehicle test. The new developed silencers showed good performance vehicle test results. also, the net cost also indicated excellent results compared with other company.

• 품질경영학회지
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• 제30권2호
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• pp.72-85
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• 2002

Advances in computer and sensor technology have made it possible to obtain superlarge manufacturing process data in real time, letting us extract meaningful information from these superlarge data sets. We propose a systematic data analysis procedure which field engineers can apply easily to manufacture quality products. The procedure consists of data cleaning and data analysis stages. Data cleaning stage is to construct a database suitable for statistical analysis from the original superlarge manufacturing process data. In the data analysis stage, we suggest a graphical easy-to-implement approach to extract practical information from the cleaned database. This study will help manufacturing companies to achieve six sigma quality.

• 한국소음진동공학회논문집
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• 제20권3호
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• pp.235-241
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• 2010

Engine Mount plays an important role which supports engine, isolates vibration from engine and blocks the vibration from road. Development of engine mount for NVH costs great a deal. So, the cost of development being reduced, the way developed effectively engine mount using DFSS technique is proposed in this paper. CTQ(critical to quality) is vibration and parameter is dynamic stiffness of mounts. The core parameters are selected with TPA(transfer path analysis) technique. It uses design of experiments(DOE) or Taguchi Methods to optimize parameter values and reduce variation. And then, this paper shows the result of improvement for vibration in the developing vehicle.

• 기술혁신학회지
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• 제7권3호
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• pp.641-656
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• 2004

L Company is producing the second sept pin, Shadow Mask which is the chief part of CRT in W, Monitor. Inside of the CRT pan, Shadow Mask leads the electronic beam to express the three primary colors; red, green, blue, and it is the core part to embody the colors. In the etching process, it produces this part with manufacturing by eroding the iron chloride. Even though the iron chloride is harmless to human body. it is necessary to diminish the amount of it on the view of preservation of environment. In addition, by studying the method of the dispossed liquid process, cutting down the manufacturing cost is a necessary task on the aspect of reconsideration of competitive business. This study shows the case that through the six sigma innovation activity, it reforms the following the former processing flow, and it reduces the amount of it by improving the efficiency of the iron chloride. By rationalization of the standard requirement cooperative company, it could cut down the manufacturing cost in the cooperative company, so it could promote the common profits.

• Communications for Statistical Applications and Methods
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• 제15권3호
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• pp.451-464
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• 2008

6 시그마는 백만 기회당 3.4개의 결점만을 갖는 최고의 품질수준을 의미한다. 일반적으로 높은 시그마 품질수준은 고객들에게 높은 만족도를 부여하는 것으로 알려져 있다. 공정능력지수들과 시그마 품질수준 $Z_{st}$는 6시그마 산업에서 공정능력을 평가하기 위하여 널리 이용되고 있다 공정능력지수에 관한 대부분의 평가들은 공정능력분석에 대해 경우에 따라 믿기 어려운 상황을 초래할 수도 있는 점 추정에 초점을 두고 있다. 본 논문에서는 현장 실무자들이 공정능력 여부를 결정하기 위하여 사용하고 있는 6시그마 품질수준 $Z_{st}$와 공정능력지수들 $C_p$, $C_{pk}$와 $C_{pm}$에 대하여 몇 가지 통계적 추정문제를 기초로 보다 효율적인 검정 방법에 대하여 제안, 연구하였다. 제안된 붓스트랩 검정 방법에 근거한 모의실험 결과는 공정분포의 정규성 여부에 관계없이 그리고 복잡한 계산 과정 없이 보다 효율적으로 적용될 수 있음을 입증하고 있다.

• 에너지공학
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• 제19권1호
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• pp.51-56
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• 2010

원유가의 불안정성 증가와 지구 온난화로 인해 에너지 절감이 글로벌 이슈화 되고 있다. 본 연구의 목적은 대학 캠퍼스에서 전기 에너지를 절감하기 위해 수행된 6시그마 프로젝트를 소개하는 것이다. 전기 에너지 절감 캠페인을 위하여 6시그마의 5단계 절차인 DMAIC를 적용하였다. 본 연구에서 전기 에너지 절감 의식 수준을 정량화하기 위한 방법을 제안하였고, 모든 캠퍼스 구성원들의 에너지 절감 의식을 변화시키기 위해 다양한 활동을 전개하였다. 추진 성과는 매우 성공적이었다. 6시그마 프로젝트를 통하여 캠퍼스 전체 전기 소비량의 약 10%를 절약하였는데, 이는 연간 비용으로 5,000만원에 해당된다. 본 연구의 성공은 세간의 관심을 끌고 있는 "녹색 장학금"을 추진하는 계기를 제공하였다. 또한, 대학 캠퍼스가 6시그마 교육을 위한 좋은 실습의 장으로 활용될 수 있음을 알 수 있었다.

• 한국공작기계학회논문집
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• 제16권6호
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• pp.15-20
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• 2007

Recently the machine industry is rapidly advanced for improving productivity. Especially an effort decreased error factors of machine tool continuously is being studied. In this paper, we propose a method that decreased vibration in the high speed spindle. By appling 6-sigma technique(DMADOV), we can grasp the influence between the housing design and a rotation accuracy. For a correct conclusion, we measure an actual spindle and analysis by $ARMD^{(R)}$(rotation analysis program). inally we find out influenceable design factors and the improvement condition about 20.7%.

• 산업공학
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• 제24권1호
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• pp.58-70
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• 2011

As more individuals and organizations participate in the complex design process of manufacturing industry, collaborative product development and management of the global supply chain have become more popular. Although the product quality concerns once focused on the manufacturing process, they are now directed at earlier stages of the design cycle where the engineering product is created as a 3D CAD model. In this paper, we describe the current state of product data quality activities in the manufacturing industry and the yardstick to measure 3D CAD data quality. Moreover we introduce a quality assurance method through the result of statistical analysis of 3D CAD models and suggest a six sigma level of CAD data quality by analyzing 76 samples provided from three Korean automotive companies.

• International Journal of Industrial Entomology and Biomaterials
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• 제10권1호
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• pp.61-64
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• 2005

General and specific combining ability effects of six bivoltine breeds of silkworm (Bombyx mori L.) were evaluated for six quantitative characters through diallel method wherein parents, $F_{1}s$ and reciprocals are involved. The breeds $APS_{11}\;and\;APS_{2}$ were found to be the best general combiners for most of the traits studied. The high estimates of specific combining ability (sca) variance (${\sigma}^{2}s$) compared to general combining ability (gca) variance (${\sigma}^{2}g$) indicated the predominant role of non-additive gene action in the control of all the characters. Positive sca effects for majority of the traits were expressed by the combinations $APS_{13}{\times}APS_6,\;APS_{13}{\times}APS_2,\;APS_{11}{\times}APS_6\;and\;APS_5{\times}APS_2$ out of 15 crosses. Among the 15 reciprocal crosses studied, the combination $APS_8{\times}APS_{13}$ showed positive reciprocal effects for all the six traits. With both the parents $APS_5\;and\;APS_2$ being good general combiners the hybrid $APS_5{\times}APS_2$ showing high sca effects is recommended for commercial use.