• 한국항해항만학회지
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• 제42권2호
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• pp.143-152
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• 2018

Currently, there are very few papers that have examined the efficiency of Vietnamese ports. Of those that have, some of them take into account only a few container ports in Northern Vietnam. Others focus on comparing all types of ports in Vietnam with regard to the differences in efficiency scores when applying different methods to evaluate efficiency. However, there is no paper that specifically analyzes the efficiency of Vietnamese container ports throughout the country or that compares Vietnamese container ports with those of other countries in terms of efficiency. In order to provide more accurate and interesting information for container port authorities, in this study, 21 major Vietnamese container ports and seven major Korean container ports are selected and examined with regard to their levels of efficiency in 2016 using data envelopment analysis (DEA). This paper applies both constant return to scale (CRS) and variable return to scale (VRS) to explore the differences among overall technical efficiency, pure technical efficiency, and scale efficiency of the selected container ports. This study also indicate slacks and sets projections for inefficient ports.

• 기술혁신학회지
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• 제4권3호
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• pp.369-382
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• 2001

In this research, the world top steel companies' technical changes were measured by the nonparametric Malmquist index. Steel industry's production frontier which was composed of multiple inputs and multiple outputs was defined by using real data of the companies from 1986 to 1998, and then the variability of technical progress(or regress) was analyzed during that period. The dynamics of individual steel companies\` technical changes, periodical technical changes, and each country's technical chanties were explained. A matrix which was based on technical chanties, technical efficiency changes, and scale efficiency changes was designed to assist to find out current position and In build up future strategies. This research results will be an valuable input to the early stage of formulating competitive strategy because the technical core capability is an important source of the each companies's competitiveness.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 학술대회 논문집 전문대학교육위원
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• pp.91-94
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• 2000

This paper is focussed on an optimal efficiency control which is operated by voltage-current pattern such as to maintain the maximum efficiency output characteristics of the motor. The voltage control is realized by phase control thyristers.

• 한국산림과학회지
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• 제103권4호
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• pp.639-645
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• 2014

본 연구는 비모수추정 방법인 자료포락 기법을 이용하여 우리나라 표고버섯 재배 임가를 대상으로 경영효율성을 평가하였다. 조사자료는 2013년 3월부터 10월까지 실시한 '표고버섯 경영 표준진단표' 적용 결과 중에서 20개 임가의 투입요소와 산출요소를 대상으로 하였다. 그리고 DEA 기법중 CCR 모형과 BCC 모형을 이용하여 기술효율성, 순수기술효율성, 규모효율성을 분석하였고 비효율성 임가의 개선방안도 제시하였다. 추가적으로 주업과 겸업재배임가의 경영효율성을 비교 분석하였다. 연구결과, 표고버섯 재배 임가의 전체기술효율성은 평균 0.655로 나타나 전체적으로 비효율성이 높은 것으로 나타났고 비효율성의 원인은 순수기술효율성(0.830)보다는 규모효율성(0.747)에 있는 것으로 분석되었다. 효율성 값이 1인 표고버섯 재배임가는 DMU2, DMU5, DMU6, DMU8, DMU10, DMU15, DMU20으로 7개 임가로 나타났다. 그리고 DMU7 재배임가의 경영효율성 진단 결과, 투입요소 중 신규접종비와 조성비에서 준거집단과 비교해 볼 때 과도하게 투입되고 있는 것으로 분석되었다. 주업과 겸업임가의 효율성 비교 결과 겸업임가가 상대적으로 비효율성이 높은 것으로 나타났고 그 원인으로 규모효율성이 문제가 있는 것으로 파악되었다.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2009년도 춘계학술대회
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• pp.337-350
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• 2009

Using the Malmquist productivity index, this paper compares the productivity of Korean manufacturing industries from 1999 to 2006. The malmquist productivity index has more advantages than previous methods such as solow model, endogenous growth theory. The malmquist productivity index can be decomposed productivity into two parts. The first part is an index of the technical efficiency change. This index has high value when the elements of production is used more efficiently. The second part is an index of technical change. This index has high value if the advent of new technology and process innovation occur.

• 한국비블리아학회지
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• 제22권4호
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• pp.301-315
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• 2011

DEA(Data Envelopment Analysis) 기법은 단위가 서로 다른 다수의 투입과 산출요소를 포함하는 기관의 상대적 효율성 평가에 유용하다. 그래서 본 연구는 29개 대학 도서관을 대상으로 상대적인 경영 효율성을 측정하고자 DEA의 CCR모형과 BCC모형을 적용하여 기술효율성(TE), 순수기술효율성(PTE), 규모효율성(SE)을 분석하였다. 투입요소로는 도서수, 자료구입비, 면적, 직원수, 자료실 좌석수가 사용되었고 산출요소로는 대출자수, 대출권수, 도서관 방문자수가 사용되었다. 분석결과 13개의 대학도서관이 효율적인 것으로 나타났고 비효율적인 대학도서관의 원인은 순수기술비효율 보다 규모비효율의 비중이 더 큰 것으로 파악되었다. 비효율적인 도서관의 규모의 수익효과는 대부분의 도서관이 규모의 수익체증 유형인 것으로 나타났다.

• 농업과학연구
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• 제33권2호
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• pp.179-193
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• 2006

Technical efficiency of semiforcing watermelon growers is 0.8248 on average, and distributed between 0.6744 and 0.9268. The result showed that semiforcing watermelon growers had by 18% of technical inefficiency and could be assumed that increasing technical efficiency could induce watermelon production more increase. Consequently, if growers' technical efficiency were improved while other environments were constant, watermelon production could be increased. Following the results from the inefficiency effect model, all assumption coefficient such as growers age etc, are significant at 10% level. Estimate of dispersion parameter ${\gamma}$ is 0.89, which confirms those differences between practical output and frontier output were derived from the technical efficiencies among growers. Differences of production system between high and low level growers in production efficiency were showed at side altitude, ventilation and heat-retaining in section of facilities and automation, soil test and calcium application in section of environment management, transplant preparation and duration of pollination in section of crop management and shipment place, sorting degree and management record analysis in section of business management respectively. As a result of analyzing consulting data by using standard diagnosis table of watermelon cultivation under structure which cultivated on semi-forced watermelon growers, gap between high and low level growers was 7.0 points in facility automation section, 7.1 points in environment section, 8.8 points in crop management section and 13.6 points in business management section, respectively, which were the biggest one among them. In case of excluding information-related items from the evaluation index of business management section, changes of business achievement are to occur. Therefore, it is recommended for us to review the standard diagnostic table of watermelon cultivation under structure by dividing evaluation index of management section into management and information.

• The Journal of Asian Finance, Economics and Business
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• 제8권7호
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• pp.111-120
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• 2021

Takaful, which is an Islamic insurance instrument, manages risks in business, according to Shariah (Islamic law) principles and offers risk protection and savings assets. The study analyzes the comparative efficiency of takaful insurance companies by implementing empirical research. The study also provides a comprehensive literature review on the efficiency analysis of the takaful industry. The empirical part presents a wide range of efficiency comparisons of 41 takaful insurance companies in 16 countries between 2009 and 2014. The data enveloping analysis technique is utilized using the rDEA package in the R environment to compute the efficiency score. In the study, the technical efficiency, overall technical efficiency, and pure technical efficiency are calculated and compared per year and per country. The findings of the study suggest that the overall average efficiency scores of takaful companies are considerably high. The study results also indicate that the excess in the consumption of inputs decreases while the deficit in achieved outputs has been declining in the covered period. The study suggests the managers of the takaful companies can use the target efficiency scores, which are calculated by using the DEA analysis, as an ideal reference benchmark for planning their inputs and outputs.

• International Journal of Quality Innovation
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• 제9권3호
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• pp.113-121
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• 2008

This paper proposes a scheme to estimate the technical efficiency of energy consumption and production and shadow prices of $CO_2$ emission in country-level at Asia Pacific countries by Data Envelopment Analysis (DEA). The result of technical efficiency estimation shows that there exists an heterogeneity and a substantial opportunity for improvement in technical efficiency at energy consumption and production across countries, specially in the $CO_2$ emission, which implies that more pollutant are spread in air. Each country will have the different willingness to pay for the additional $CO_2$ emission right and this result enables us to predict the competition in international $CO_2$ emission right market.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.730-736
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• 2009

The objective of this paper is to measure the relative technical efficiency of Korean railway transport service. Previous studies on the efficiency in Korean railway service have carried out before the structural reform of Korean railway industry in 2004, whereas this study used the latest data which reflected the impact of reform. We analyzed the efficiency in Korean railway transport by means of measuring the technical efficiencies of other countries, these were estimated with data envelopment analysis. DEA has gained great popularity in measuring efficiency in transport industry, school, government, hospital and so on in recent years. This analysis could serve as peer to help improve performance of the railway management and operation.