Lean Six Sigma 기법을 이용한 생산시스템 개선 및 확장 모델 연구

서장훈 동의대학교 경제경영전략연구소 2009 經濟經營硏究 Vol.4 No.2

Lean Six Sigma(LSS) is a business improvement methodology which combines (as the name implies) tools from both Lean Manufacturing and Six Sigma. Lean manufacturing focuses on speed and traditional Six Sigma focuses on quality. By combining the two, the result is better quality faster. Both the Lean and the Six Sigma methodologies have proven over the last twenty years that it is possible to achieve dramatic improvements in cost, quality, and time by focusing on process performance. Therefore, many firms are looking for an approach that allows to combines both methodologies into an integrated system or improvement roadmap. However, the differences between the Six Sigma and Lean are profound. Using Lean Six Sigma for strategic advantage in Business flow. The ROI of Lean Six Sigma for services Getting faster to get better(why you need both Lean and Six Sigma) Improving services. As a Result, Lean Six Sigma System derives the long-term success for the powerful management system. This paper shows that the execution of Lean 6sigma method can be successful only if the management officers' interest and support are back up. And we suggest a guideline that continuous improvement factors and performance Tool are the most necessary factors for the successful cooperation management using LSS

기-액흐름 연속누출에 의한 개방공간 증기운 폭발사고를 중심으로 중,소규모 사업장을 위한 사고 영향평가 방법

장서일,이헌창,조지훈,김태옥 한국산업안전학회 2003 한국안전학회지 Vol.18 No.1

For the unconfined vapor cloud explosion(UVCE) accident by the continuous release of gas-liquid flow of various saturated liquids in a vessel at ground level, overpressures were estimated by TNT equivalency model with two estimation methods, such as UVCE Ⅰ model based on a constant release time and UVCEⅡ model based on a real travel time of vapor by dispersion and analyzed with various release conditions. As a simulation result, the simple, easy, and correct method of evaluation of consequences of the UVCE accident was proposed by using consequences of UVCEⅠ model and correlation equations for differences of overpressures between UVCE models, so that this evaluation method could be used easily in the small and medium size enterprises without using the dispersion model.

효과적인 SCM 구축을 위한 Positioning & Strategy에 관한 사례연구

서장훈,양광모,박명규 한국생산성학회 2004 生産性論集 Vol.18 No.2

Recently, an enterprise's survival strategy is a difficult task, because the competition of a business is more complex ever. The research aims to demonstrate the dynamic structural change in a conceptual point of SCM positioning & strategy. But it has many problems since it is difficult and wide to define. Therefore, the Manager don't aware a total executable implementation even though the enterprise knows necessity of SCM. This paper focuses on a proposal of alternatives with reasonable positioning like most of enterprises willing to overcome such as carelessness and unready strategy of investment, additionally, the thesis should effort to find an element through an analysis of cases, a statistical method of effective SCM, and actual survey to propose an alternative between Positioning & Strategy in Enterprise SCM.

여드름양 발진에서의 말라쎄지아 포자 검출 빈도에 관한 연구

박장규,이웅재,김연수,서영준,김경호,이증훈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2

Steroid acne and pityrosporum folliculitis have similar clinical manifestations. So it was not casy to do differential diagnosis of these two diseases. We have tried to find out the different points between these diseases in clinical characteristics, positive rate of the malassezia spores, and their response to antifungal agents. We studied 21 patients with acneiform eruptions which were distinct from acne vulgaris. Patients were divided into two groups by steroid treatment history. Among 21 patients, 6 were administered steroid just before eruption and 15 were free from steroid within 6 months. We have examined malassezia spores with 10% KOH/Parker blue black ink mount from papules, pustules and comedones according to the patients skin lesions. The malassezia spores detected in 5 paticnts(83.3%) in the former and 9 patients(60%) in the latter. In malassezia folliculitis, the frequency of which showed above the (3+) score of malassezia spore under microscopy was higher than in steroid acne. Mean duration of the disease was 70.4 weeks in latter group, which was longer than 5.2 weeks of the former group. And there were some differences between two groups in the distribution of the lesions. Mean treatment duration was same in two groups (4 wks, 3.5 wks). Steroid acne patients would be treated better with antifungal agents than with acne regimens.

유두에 발생한 음부 평활근종 1예

계경채,이영,서영준,이증훈,박장규,김진만,김협 대한피부과학회 2006 大韓皮膚科學會誌 Vol.44 No.4

재래식 시장 지하 상인의 호흡기증상 및 폐기능 조사 연구

이승관,이창규,조경진,임현표,서장훈,최윤수 高麗大學校 倂設 保健大學 保健科學硏究所 1998 保健科學論集 Vol.24 No.1

The prevalence of respiratory symptoms and pulmonary function were studied in a group of 55 whole-sale market merchants Working in underground. As a control group, 55 whitecollar workers was also included in this study. Following results were obtained. A higher complaint for respiratory symptoms(cough, sputum, chest tightness, shortness of breath) was found among merchants than control workers. The measurement value for FVC, FEV1.0, FEV 1.0% in the merchants were reveal to lower figure in comparison with control groups. The measurement Value for MVV, PEF in the merchants were lower than control groups, but was not significant statistically. The pattern of pulmonary ventilation disturbance in the whole-sale market merchant were the same as followings : restrictive disturbance(6 person), abstrictive disturbance(1 person), and combined disturbance(1 person).

Contemplation of Risk Management for Internet Banking System

Seo, Jang-Hoon,Park, Myeong-Kyu Korea Safety ManagementScience 2003 안전경영과학회지 Vol.5 No.2

Next Generation internet banking service for important role of banking business competitive power separates service function of individual banking and should equip various service that coincides in each special qualities these are customer management, portfolio management, global corporation support etc. The past few years have been characterized by rapid changes in technology and the introduction of corporate and retail banking services through the Internet. the integration of e-banking platforms with legacy systems and the increasing dependence of banks on third party information service providers, all dramatically amplify the magnitude of risks to which banks are exposed. Risk management disciplines have not evolved at the same speed and many institutions, especially the smaller ones, have not been able to incorporate Internet banking risk controls within their existing risk management structures. This article provides an overview of the various risks which are heightened with Internet banking, and a holistic approach to managing these risks. In addition, the presentation will explain the different risk areas and the controls to be adopted to mitigate these risks.

Contemplation of Risk Management for Internet Banking System

Jang-Hoon Seo,Myeong-Kyu Park 대한안전경영과학회 2003 대한안전경영과학회지 Vol.5 No.2

Next Generation internet banking service for important role of banking business competitive power separates service function of individual banking and should equip various service that coincides in each special qualities these are customer management, portfolio management, global corporation support etc. The past few years have been characterized by rapid changes in technology and the introduction of corporate and retail banking services through the Internet. the integration of e-banking platforms with legacy systems and the increasing dependence of banks on third party information service providers, all dramatically amplify the magnitude of risks to which banks are exposed. Risk management disciplines have not evolved at the same speed and many institutions, especially the smaller ones, have not been able to incorporate Internet banking risk controls within their existing risk management structures. This article provides an overview of the various risks which are heightened with Internet banking, and a holistic approach to managing these risks. In addition, the presentation will explain the different risk areas and the controls to be adopted to mitigate these risks.

Debate about Control Self-Assessment Model for e-Business System Safeguard

Seo Jang Hoon 대한안전경영과학회 2005 대한안전경영과학회지 Vol.7 No.5

자가통제평가(CSA : Control Self Assessment)는 핵심사업 목적을 달성하는데 개입되는 위험 그리고 그러한 사업위험을 관리하기 위하여 설계된 내부통제를 공식적이고 문서화된 협력적 프로세스에 의하여 검토하기 위하여 사용되는 방법론이다. 현재 많은 기업에서 효과적인 조직통제와 비즈니스 프로세스 개선을 위하여 전문 감사인과 경영인들이 기업지배구조 조직의 강력한 위험관리 도구로서 자가통제평가의 필요성을 강조하고 있다. 자가통제평가는 해당 조직의 담당부서나 팀에서 내부통제평가를 통하여 내부통제상의 재무보고, 준법, 사업 및 운영상의 효율성 등을 확보하기 위해서 설치되며, 효과적인 모니터 장치로서 기업지배구조상의 업무 프로세스를 정비하고 업무에서 발생하는 제반 정보의 흐름을 원활하게 해서 조직에게 손해가 발생할 수 있는 여러 가지 위험으로부터 회사를 사전에 차단하는 기능을 한다. 이러한 부분에서 효과적인 자가통제평가 시스템을 구축하는 것이 중요할 것이다. 본 연구에서는 e-Business 관련 기업지배구조의 안전성을 확보하기 위한 자가통제평가 모델에 대한 개발 필요성과 관련 자가통제평가 세가지 기본 모델들을 통하여 장단점을 제시하고, 자가통제평가 모델의 필요성을 논의하였다.

Biochemical Studies on Proteinase in Acanthamoeba culbertsoni

Seo,Jang-Hoon,Yong,Tai-Soon,Im,Kyung-Il INSTITUTE OF TROPICAL MEDICINE YONSEI UNIVERSITY 1991 YONSEI REPORTS ON TROPICAL MEDICINE Vol.22 No.1

병원성 자유생활아메바 A. culbertsoni의 세포내 단백분해효소와 세포외 단백분해효소의 생화학적 특서을 규명하고자 하였다. A. culbertsoni를 초음파를 이용하여 파쇄한 후 원심분리하여 상청액을 세포내 단백분해 효소원으로 사용하였으며, log phase까지 배양한 배지를 원심분리하고 상청액을 취하여 filter로 거른 후 세포외 단백분해 효소원으로 사용하였다. 단백분해효소의 적정 pH를 알아보고자 azocasein을 기질로 사용하여 pH 4.0에서 pH 8.5까지 변화시켜주면서 활성을 측정하여 본 결과 세포내 단백분해효소와 세포외 단백분해효소의 적정 pH는 각각 pH 5.5와 pH 6.0이었다. 활성에 필수적인 아미노산 잔기를 확인하고자 DTNB, NEM, PMSF, NAI, PLP, TNBS, EDTA, DEP, phenlyglyoxal를 처리한 결과, 세포와 단백분해효소는 serine이 활성에 관여할 것으로 생각되며 세포내 단백분해효소는 serine과 arginine이 활성에 관여할 것으로 사료되었다. 또한, gelation를 기질로 하는 1% SDS가 포함된 PAGE를 이용해서 세포내 단백분해효소와 세포외 단백분해효소가 각각 Rf값을 달리하는 5개와 2개의 효소 분획으로 되어있음을 확인하였다. 한편, PMSF를 처리하여 준 결과 분획된 효소의 활성이 감소함을 전기영동을 이용하여 관찰할 수 있었다. Biochemical properties of the proteinase in Acanthamoeba culbertsoni were examined. Intracelluar and extracellular proteinase activity in Acanthamoeba culbertsoni were maximal in the condition of pH 5.5, respectively. To investigate their essential amino acids for catalysis, chemical modification was carried out by using various inhibitors. Phenylmethylsufonylfluoride (PMSF), hydroxyl group directed reagent, inhibited the intracellular and extracellular proteinase, and phenyloglyoxal, arginine directed reagent, also inhibited the intracellular proteinase. The rate of inactivation by PMSF and phenylglyozal were proportional to the concentration of the modification reagents and incubation time, suggesting that the essential amino acids of intracellular proteinase activity were serine and arginine, and the essential amino acid of extracellular proteinase activity was serine. A highly sensitive electrophoretic method involving gelation-containing polyacrylamide gels was used to analyze the proteinase. Multiple proteinase forms in the extracts of A. culbertsoni trophozoites and culture medium were found by this method. Intracellular and extracellular proteinase had at least five and two bands of activity of electrophoresis, respectively. All of the enzymes had characteristics of serine proteinase.