• 한국산업정보학회논문지
• /
• 제14권1호
• /
• pp.32-42
• /
• 2009

정보통신산업은 성장성이 높은 산업으로 세계경제성장을 주도하고 있으며 경제전반에 지대한 파급효과와 경제구조 고도화에 크게 기여하고 있다. 정보화 사회를 구현하는 기반산업으로서 전 세계에 걸쳐 기술개발을 통한 비약적인 발전이 가능한 산업이 정보통신산업이라고 할 수 있다. 특히, 기술혁신이 매우 급속하여 다른 산업에 대한 기술적 파급 효과가 크고 기술인력에 대한 의존도가 매우 높은 고도의 기술집약적 산업이다. 본 연구의 목적은 국내 정보통신산업체의 효율성을 DEA기법으로 분석함으로써 벤치마킹의 대상이 될 수 있는 정보통신업체의 경영효율성을 분석하였으며, 비효율적인 기업을 위한 각 기업이 개선시켜야하는 투사값을 제시함으로써 기업의 효율성을 위한 수치를 제공하고자 한다. 분석결과 총 29개 정보통신업들의 CCR-I, BCC-I 효율성과 규모수익성(RTS)을 평가하였다. 또한 분석된 자료를 바탕으로 벤치마킹의 대상이 될 수 있는 정보통신업을 제시하였다. 분석결과 CCR-I효율성이 1인 업체는 7개 기업, BCC-I효율성이 1인 업체는 12개 기업으로 분석되었다. 규모수익성은 IRS가 8개의 기업, DRS가 10개 기업, CRS가 11개 기업으로 분석되었다.

• 품질경영학회지
• /
• 제39권2호
• /
• pp.244-255
• /
• 2011

In this study, we try to evaluate the efficiency of the photonics industry using a data envelopment analysis(DEA) model. We first develope four stage procedures for selecting proper input and output variables which consist of selecting the first candidate variables from literature survey, selecting the second candidate variables through experts' discussion, measuring the partial efficiency of the selected variables based on Tofallis' profiling, and clustering some variables through the rank correlation analysis of partial efficiency proposed by Min and Kim(l998). With this procedure, we select 4 input variables(capital, number of employee, R&D cost, operating cost) and 2 output variables(sales, growth of sales) and then utilize CCR and BCC model to measure efficiencies of 26 photonics companies in Gwangju. Moreover, we perform the reference group analysis to figure out what causes inefficiencies and to provide the desirable values for input and output variables at which inefficient photonics companies become efficient. Finally, we classify 26 photonics companies into three groups such as optical communications, optical applications, and optical sources, and perform the Kruskal-Wallis test to check if there exist some differences between efficiencies of three groups.

• 한국건설관리학회논문집
• /
• 제6권1호
• /
• pp.151-161
• /
• 2005

본 연구는 자료포락분석(Data Envelopment Analysis, DEA)을 이용하여 국내 건설회사를 대상으로 효율성을 측정하고 효율성의 연도별 추이를 파악하며 개별기업 및 산업차원에서 비효율성에 영향을 미치는 요인을 분석하였다. CCR모형 및 BCC모형을 적용하여 기술적 효율성 및 순수기술적 효율성을 측정하였고 Window분석을 통하여 연도별 효율성의 변화 추이를 파악하였다. 또한 비효율적인 기업을 대상으로 효율적인 기업이 되기 위한 목표치와 참조집합을 예시하였으며 수익성과 효율성의 시계열자료를 이용하여 효율성 측면에서의 선도기업을 도출하였다. 효율성에 영향을 미치는 요인으로 기업집단의 소속여부에 따른 효율성 차이를 검증하고, 매출액 중 건축비중, 토목비중, 외주비율 등과 효율성과의 상관관계를 식별하였다. 이와 같은 분석은 개별 기업의 효율성에 관한 벤치마킹 및 전략목표설정에 기여하며, 산업경쟁력을 높이기 위한 바람직한 정책 수립에 활용될 수 있다.

• 대한교통학회지
• /
• 제28권5호
• /
• pp.43-54
• /
• 2010

본 연구에서는 현행 버스 서비스 평가체계를 보완하고 선행연구에 비해 합리적인 분석결과를 도출하기 위해 유익 유해산출물을 모두 반영한 수정 BCC 모형을 이용하여 2009년 서울시 113개 간선버스노선의 효율성을 추정하였다. 분석대상은 총 보유비와 총 가동비, 중앙차로 정류장수 비율과 타노선과의 중복길이를 사용하여 유익산출물인 총 승객수와 서비스 만족도 점수, 그리고 유해산출물인 CO2 배출량을 산출하는 형태로 상정하였다. 분석결과 유해산출물을 함께 반영한 모형이 유익산출물만을 반영한 모형에 비해 합리적인 결과를 도출하는 것으로 나타났다. 서울시 간선버스노선은 총 보유비와 총 가동비, 그리고 타노선과의 중복길이를 평균적으로 약 10% 감소할 수 있으며, 중앙차로 정류장수 비율은 약 160% 증가시킬 수 있는 것으로 분석되었다. 한편 효율성에 영향을 미치는 결정요인을 분석하기 위한 토빗회귀분석을 수행한 결과 총 보유비와 중앙차로 정류장수 비율이 통계적으로 유의미성을 확보하였다.

• 융합보안논문지
• /
• 제23권2호
• /
• pp.95-102
• /
• 2023

본 연구의 목적은 최근의 장교 지원율 하락에 따른 장교획득 수준의 시대적 심각성을 반영하여 장교 양성과정에서 핵심적인 역할을 수행하고 있는 일반대학 군사학과의 운영 수준을 상대적인 평가, 분석을 바탕으로 실증적 연구를 통하여 확인해 보고 개선을 위한 의미있는 결과를 확인하였다. 육군과 협약, 준협약을 통하여 운영되고 있는 일반대학 군사학과는 11개이며 대학별 군사학과 운영을 위해 투입되는 자원입력과 성과관점에서 자료포락분석법(DEA, Data Envelopment Analysis)을 적용하여 상대적인 효율성을 분석하고 개선을 위한 구체적인 방향을 확인하였다. 운영 효율성 분석결과, 11개 DMU 중에서 BCC모델의 경우 6개 대학이 효율적인 것으로 나타났고 자료포락분석 방법을 통하여 효율적, 비효율적인 집단에 대한 구분을 통해 평가결과를 확인해 볼 수 있었다. 본 연구는 상대적인 효율성을 평가하는데 여러 개의 평가요소를 한꺼번에 반영하여 초과, 부족한 부분을 나타내는 DEA-Additive 모델을 통해 비교대상 대학 군사학과들의 상대적인 측면에서 효율성을 확인하고 발전을 위한 구체적인 정보를 확인한다는 점에서 실용적 가치가 있을 수 있다.

• 유통과학연구
• /
• 제12권8호
• /
• pp.5-15
• /
• 2014

Purpose - The method of TV home shopping is a kind of retail method that provides the viewer with information about products and, further, sells the products to consumers through the media of television. The domestic home-shopping industry has been expanding since 1995, and there are six companies in this arena as of 2012. In this study, we evaluate the management efficiency of TV home-shopping companies and provide suggestions for improving efficiency, using the DEA (data envelopment analysis) model. Hence, we expect to contribute to the progress of the companies' efficiency and the development of the TV home-shopping industry, where deepening competition is inevitable because it is experiencing the maturing market stage in its life cycle. Research design, data, and methodology - Efficiency is the ratio of the quantity of input to the quantity of output of a product or service. It is necessary to estimate aggregate inputs and aggregate outputs, which are calculated by applying a weighting to a number of input and output factors, to measure the efficiency. The DEA model is divided into the CCR model and the BCC model. The CCR model is a basic model that assumed constant returns to scale (CRS), and the BCC model extends the CCR model to accommodate technologies exhibiting variable returns to scale (VRS), and concerns only the technical efficiency without considering the efficiency of returns to scale. In this study, we consider six companies each year from 2008 to 2012 as a DMU (Decision Making Unit) and analyze the differences in efficiency for each company in each year. Furthermore, we evaluate the operating characteristics of TV home-shopping companies, using three models, in accordance with the overall performance, profitability, and marketability of the business. Results - The result of the analysis, using DEA models, shows that Hyundai Home Shopping (2009, 2010, 2011), GS Home Shopping (2011), NS Home Shopping (2011) and CJ O Shopping (2012) possess MPSS (most productive scale size), with a score 1.0 in CCR, BCC, and scale efficiency. Particularly, Hyundai Home Shopping is shown to be the most efficient in terms of overall business performance, marketability, and profitability. The overall efficiency of the home shopping industry has displayed an increasing trend since 2008, even though it decreased marginally in 2012; further, we can observe that home shopping companies operate with increasing efficiency with the passage of time. Conclusions - Home shopping companies have focused on market expansion rather than profits, as they displayed better efficiency in marketability than increase in profitability during the period 2008-2012. In addition, the main reason for the increased efficiency in the home shopping industry is the market expansion through the revenue increase of each home shopping company. This study can be used as a reference when home shopping companies attempt to devise future strategies, as it suggests efficiency benchmarks and development levels for each home shopping company.

• 품질경영학회지
• /
• 제47권1호
• /
• pp.163-186
• /
• 2019

Purpose: The purpose of this study was to present a methodology for assessing the efficiency of supply chain quality management considering characteristics of defense industries to provide academic and policy implications for strengthening quality competitiveness of military supplies. Methods: Using the defense industry's empirical data, conduct an efficiency evaluation by utilizing a multi-stage DEA/Entropy Model for defense industries subject to the quality level survey of military goods manufacturers in 2017. Results: The results of this study are as follows; the first step of the multi-stage DEA model, Quality Management Performance Efficiency Analysis, shows that the CCR model and the BCC model are more efficient than the parent company. the second stage of the multi-stage DEA model showed that the CCR model was slightly more efficient than the parent company and the BCC model was more efficient than the parent.the overall efficiency value of the multistage DEA model, calculated by multipointing the efficiency value of the first stage by the second stage, was more efficient than the parent. Conclusion: The results of this study show that the efficiency of supply chian quality management performance and profitability in the defense industry can be analyzed for the first time using the multistage DEA/Entropy model to identify specific inefficiencies and support objective decision making.

• 한국병원경영학회지
• /
• 제12권1호
• /
• pp.51-74
• /
• 2007

This study applied Data Envelopment Analysis to a set of Korean Public Corporation Medical Centers and Japanese Municipal Hospitals to compare their relative human resource efficiencies. Based on the data provided on the inputs and outputs, the analysis showed Japanese municipal hospitals were relatively efficient than Korean hospitals. The result of analysing BCC model shows 5 hospitals in Japan and 7 in Korea with an efficiency rating of less than 1 as considered relatively inefficient. For the inefficient hospitals the manner in which inefficient hospitals may be made efficient were indicated by the managerial strategies based on dual variables. A subsequent analysis of Wilcoxon rank-sum test revealed that the medical revenue per medical expense, labor cost per value added revenue were statistically significant between efficient and inefficient Korean hospitals and medical revenue per medical expense, labor cost per value added revenue, bed occupancy rate, average length of stay, rate of personnel expenses per medical revenue were statistically significant between efficient and inefficient Japanese hospitals.

• 소성∙가공
• /
• 제16권4호
• /
• pp.276-281
• /
• 2007

The hardening and the constitutive equation based on the crystal plasticity are introduced for the numerical simulation of hemispherical sheet metal forming. For calculating the deformation and the stress of the crystal, Taylor's model of the crystalline aggregate is employed. The hardening is evaluated by using the Taylor factor, the critical resolved shear stress of the slip system, and the sum of the crystallographic shears. During the hemispherical forming process, the texture of the sheet metal is evolved by the plastic deformation of the crystal. By calculating the Euler angles of the BCC sheet, the texture evolution of the sheet is traced during the forming process. Deformation texture of the BCC sheet is represented by using the pole figure. The comparison of the strain distribution and punch force in the hemispherical forming process between the prediction using crystal plasticity and experiment shows the verification of the crystal plasticity-based formulation and the accuracy of the hardening and constitutive equation obtained from the crystal plasticity.

• 한국데이타베이스학회:학술대회논문집
• /
• 한국데이타베이스학회 2008년도 연합학회학술대회
• /
• pp.321-338
• /
• 2008

Information and communication industry, which shows rapid growth rate, is now leading the global economic growth, contributing a ripple effect on general business and economic structure. It is said that information and communication industry enables swift economic growth taking a role as a basic industry of information-oriented society. Especially, rapid technical innovation promotes mutual growth of other related industries and it is technology-intensive. The purpose of this research is to analyze the management efficiency of information and communication industry using DEA method, and finally suggest numerical value for inefficient organizations to improve their efficiency. CCR-I, BCC-I efficiency and RTS(Returns to scale) of 29 companies engaged in information and communication industry was evaluated. With the results, I suggested model companies for benchmarking in information and communication industry. To summarize, 7 companies were selected with CCR-I efficiency rate 1, and 12 companies with BCC-I efficiency rate 1. RTS was finalized with 8 IRS companies, 10 DRS companies, and 11 CRS companies.