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기업전략에 따른 정보기술(IT) 투자의 효율성 평가를 위한 PCA-DEA 모형 적용에 대한 연구
임호순(Ho-Sun Rhim),김대기(Dae-Ki Kim),우영운(Young-Woon Woo),손명호(Myung-Ho Sohn) 한국생산관리학회 2004 韓國生産管理學會誌 Vol.15 No.2
본 연구에서는 기업전략과 연계한 BSC(Balanced Scorecard)관점에서의 정보기술(IT) 투자효율성을 DEA(Data Envelopment Alnalysis) 모형으로 측정하였다. DEA 모형에서는 일반적으로 투입요소와 산출요소가 많아지면 특성상 지나치게 많은 DMU(Desision Making Unit)들이 효율적으로 나타나기 때문에 효율성 분석이 용이하지 않게 된다. 이러한 문제를 극복하지 위한 방법 중의 하나로써 주성분분석(PCA,Principle Component Analysis)을 이용하는 PCA-DEA모형을 수정, 적용하였다. 모형이 제시하는 결과를 바탕으로 기업의 전략 유형별 IT 투자의 효율성 차이를 분석하였다. 실증분석을 위하여 국내 전국기업연감에 수록되어 있는 218개 업체를 무작위로 선장하여 기업전략에 따른 BSCdml KPI들에 대한 값을 설문 조사하였다. In this paper, we study efficiency of IT investiment using modified DEA(data envelop analysis) model, Input and output variables are selected from KPI(kep performance index) of Balanced Scorecard model Discriminant power of DEA model is increased by applying principal component analysis method. Data set is collected through interview with 218 randomly selected firms. The differences of efficiency scores between firms adoptin different strategies are tested.
김상국(Sang Guk Kim),양승원(Seung Won Yang),박상후(Sang Hoo Park),이경록(Kyung Rok Lee),박재홍(Jae Hong Park),장안수(An Soo Jang),서정평(Jeong Pyeong Seo),이숭(Soong Lee),남해성(Hae Sung Nam),손명호(Myung Ho Sun),신명근(Myung Geun S 대한내과학회 2001 대한내과학회지 Vol.60 No.6
N/A Background : Significant ethnic and geographic differences exist in the prevalence of diabetes mellitus, which has increased dramatically in South Korea. But a few population-based studies were performed in South Korea. The purpose of this study was to determine the prevalence of diabetes mellitus, impaired glucose tolerance (IGT) and impaired fasting glucose (IFG) by the World Health Organization (WHO) and the American Diabetic Association (ADA) diagnostic categories, and to investigate their associated risk factors. Methods : Between march 22, 1999 and July 14, 1999, a random sampling of 1445 residents over 40 year of age in five villages in the Namwon county of South Korea was carried out. Among these subjects, 665 (46.0%) participants completed 75 g OGTT. WHO and ADA diagnostic criteria were used for the diagnosis of diabetes mellitus, IGT and IFG. Detailed questionnaire were performed and anthropometric data were collected. Results : After age-adjustment for population projection for Korea (1999), the prevalence of diabetes and IGT were 13.7% and 13.8% with WHO criteria, while the prevalence of diabetes, IGT and IFG were 15.8%, 12.8% and 5.7% with ADA criteria. The age-adjusted prevalence of previously diagnosed diabetes was 5.8%. The level of agreement between WHO and ADA diagnostic criteria except IFG was high (κ=0.94; p<0.001). The ROC curve analysis determined FSG of 114.5 mg/dL (6.4 mmol/L) to yield optimal sensitivity and specificity corresponding to a PP2SG 200 mg/dL (11.1 mmol/L). The prevalence of diabetes and IGT with ADA diagnostic criteria rose with increasing age (p<0.05). The difference in the prevalence of diabetes, IGT and IFG by BMI was not significant. The prevalence of diabetes rose with increase in the waist-hip ratio. The prevalence of diabetes was increased in subjects with dyslipidemia (Odds ratio 2.29, 95% CI: 1.16-3.49).