• International Journal of Automotive Technology
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• 제4권4호
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• pp.193-201
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• 2003

The problem of brake judder is typically caused by defects of quality manufacturing. DFSS (Design for six sigma) is a design process for quality improvement. DFSS will result in more improved but less expensive quality products. This paper presents an implementation of DFSS for quality improvement of the brake judder of heavy-duty trucks. Carrying out 5 steps of DFSS, the major reasons for defects of quality are found. The numerical approximation of the brake system is derived by means of the response surface method. Its quality for brake judder is improved by using the sigma based robust design methodology. Results are compared between the conventional deterministic optimal design and the proposed sigma based robust design. The proposed one shows that manufacturing cost may increase as the quality level increase. The proposed one, however, is more economical in aspect of the overall cost since the probability of failure dramatically goes down.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2007년도 춘계학술대회
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• pp.498-502
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• 2007

The objective of this study aims at proposing a method of Supply Chain Management using Six Sigma. Six Sigma is at the top of the agenda for many companies that try to reduce cost and improve productivity. This paper explains how Six Sigma can be integrated and processed with Supply Chain Management.

• 대한안전경영과학회지
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• 제9권3호
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• pp.95-102
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• 2007

Nowadays, globally high-grade companies have done their best for increasing their competitive power through a many kinds of method in incisive competition for making certain of a pacesetting position. Among the rest, Six Sigma have been the best methodology of improving process and have proven to be effective by the result of improving process in many of manufacturing business, however, it has not obtained excellent results in the transaction business. In transaction business, a $30\sim50%$ costs in total costs is generated by slow-speed working and reworking. The slow processes decrease the quality and increase the cost, which decreases customer satisfaction, and finally the income is decreased. All of them are so called wastes in processes. For this, adopting of lean six sigma methodology in process management can eliminate the wastes and reduce the variation. This study focuses on distribution with the domains like capacity, layout, amount of location, assignment of product, operation procedure and operation rule in order to improve these domains, we make a further application of eight analysis ways based on DMAIC method for improving operation of processes of distribution center as the third profit source. The goal of this study is to trace an approach that can easily adopt of Lean Six Sigma in operational management of distribution center by a kind of data, analysis method and template.

• 벤처창업연구
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• 제10권5호
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• pp.63-71
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• 2015

린 6시그마 또한 6시그마처럼 도입하고자 하는 조직의 특성에 맞게 불합리한 사항과 미비사항을 사전의 파악하여 보완하지 않고, 조직의 특성과 기본 여건을 고려하지 않은 상태에서 추진되어진다면 아마도 추진 사무국 및 전담자의 과중한 업무가 하나 더 늘어나는 결과를 초래할 수 있으므로 린 6시그마 문헌연구와 적용구축 사례 분석과 현재까지 지속적으로 6시그마 활동을 10년 이상 추진 중인 15개 업체에 소속된 벨트(MBB, BB) 96명으로부터 접수된 설문지 내용을 조사하여 얻어진 자료를 통계분석 프로그램인 SPSS 16.0을 사용하여 설문자료의 신뢰성과 타당성을 분석하였고, 6시그마 추진 시행성과, 6시그마 프로젝트 개선안 실행력 제고방안, 6시그마 추진 시 발생하는 당면한 문제점과 개선 및 보완사항을 파악하여 기존 6시그마에 린 생산방식을 합리적으로 통합시켜 린 6시그마 도입 시 경영혁신을 위한 린 6시그마 활동의 효과적인 전개 방법을 제안하였다.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2002년도 학술대회지
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• pp.311-315
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• 2002

최근 새로이 대두되고 있는 신 경영혁신 전략인 6시그마 경영은 이미 제조업이나 서비스업 등에서 큰 성과를 보이고 있으며 세계적으로 경영혁신 전략의 표본으로 널리 확산되고 있다. 하지만, 건설산업의 경우 이러한 경영기법을 적용한 사례가 많지 않으며 이미 적용되었던 경영기법조차 그 성과가 미미한 실정이다. 이에 본 연구에서는 6시그마에 대한 이론적인 고찰과 아울러 그 적용요건을 살펴보고 신 품질관리기법으로 건설산업에 접목되었을 때의 문제점을 파악하여 구체적이며 실제적인 6시그마 적용절차 및 방법론을 제시하고자 한다. 본 연구 결과는 건설산업의 6시그마 경영의 도입에 기초적인 연구로서 활용될 것이다.

• 품질경영학회지
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• 제50권3호
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• pp.373-386
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• 2022

Purpose: This study proposes the application of Six Sigma management innovation method for more systematically enhanced execution of Quality by Design (QbD) activities. QbD requires a deeper understanding of the product and process at the design and development stage of the drug, and it is very important to ensure that no fault is fundamentally generated through thorough process control. Methods: Analyzing the background and specific procedures of quality improvement based on the drug design basis, and analyzing the key contents of each step, we have differentated and common points from the 6 Sigma methodology. We propose a new model of Six Sigma management innovation method suitable for pharmaceutical industry. Results: Regulatory agencies are demanding results from statistical analysis as a scientific basis in developing medicines to treat human life through quality improvement activities based on drug design. By utilizing the education system to improve the statistical analysis capacity in the Six Sigma activities and operating the 6 Sigma Belt system in conjunction, it helped systematically strengthen the execution power of quality improvement activities based on pharmaceutical design based on the members of the pharmaceutical industry. Conclusion: By using QbD Six Sigma, which combines quality enhancement based on pharmaceutical design basis and Six Sigma methodology suitable for pharmaceutical industry, it is possible to obtain satisfactory results both by pharmaceutical companies and regulators by using appropriate statistical analysis methods for preparing scientific evidence data required by regulatory.

• 대한산업공학회지
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• 제32권4호
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• pp.314-322
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• 2006

Despite its brilliant success, Six Sigma has suffered from two shortcomings, namely, the lack of a systematic method to identify the right projects in the "Define" stage and to sustain the improvement in the "Control" stage. The integration of Six Sigma and Business Process Management(BPM) seems to be a promising way to overcome the shortcomings of Six Sigma. This paper first reviews the existing efforts on this issue, and then proposes a framework for an effective integration of Six Sigma and BPM. The framework consists of five phases - DEFINE, EXECUTE, MONITOR, ANALYZE, and IMPROVE(DEMAI). A detailed description on the procedural model is also presented.

• 한국수소및신에너지학회논문집
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• 제20권6호
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• pp.492-498
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• 2009

Six sigma methode was applied for optimization of flow field design of a proton exchange membrane fuel cell (PEMFC). The optimization between number of channel and channel/rib width was suggested in this paper with six sigma method. With the help of six sigma design of experiment (DOE) the number of experiments may be reduced dramatically. The fuel cell channel design optimization with results of these experiments with a 100 $cm^2$ serpentine flow field indicates a optimization data for a given constant operating conditions.

• 품질경영학회지
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• 제33권2호
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• pp.74-86
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• 2005

The project objectives, called critical-to-quality (CTQs) in six sigma, should be defined to faithfully reflect the customer requirements. The identification of such a set of CTQs, which is currently done using brainstorming in practice, is a challenging task. Notwithstanding the rapid growth of the six sigma literature, development of a systematic procedure for identifying CTQs has scarcely been addressed. This paper proposes a systematic method for generating CTQ candidates based on the given voice of the customer in the DFSS/C (Design for Six Sigma / Commercial) context. By providing a step-by-step procedure, the proposed method ensures that all the important CTQ candidates are identified and subjective judgments are minimally required. Hence, the shortcomings associated with the existing practice based on brainstorming can be effectively overcome. The unique characteristics of the proposed method are also demonstrated via a case study.

• 한국연소학회:학술대회논문집
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• 한국연소학회 2012년도 제44회 KOSCO SYMPOSIUM 초록집
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• pp.195-196
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• 2012

This paper describes combustion tuning methodology of double-swirl gas turbine combustor using six sigma tools. This methodology is consist of five steps-Define, Identify, Design, Optimize and Verify (DIDOV). First, the NOx reduction target was defined in the step design; second, the current status of the plant was diagnosed in the step of identify; third, the vital few control parameters to achieve the defined target were determined by analyzing the correlation between the control parameters and NOx emissions in the step of design; fourth, the optimum condition was derived from one of the six sigma tools in the step of optimize; finally, the optimum condition was verified by applying the condition to the gas turbine combustor in the step of verify. As a result of the suggested method, averaged NOx emissions were reduced by more than 70% and the standard deviation was improved by more than 60%. Thus, this methodology can be attributed to the efficient reduction of NOx emission with saving combustion tuning time.