• Title/Summary/Keyword: 자료포락 분석

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A Study on Cost Benefit Analysis Optimization Model for Water Distribution Network Rehabilitation Project of Taebaek Region (태백권 배수관망 개량사업의 비용효과분석 최적화 모델 연구)

  • Kim, Taegon;Choi, Taeho;Kim, Kyoungpil;Koo, Jayong
    • Journal of Korean Society of Water and Wastewater
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    • v.29 no.3
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    • pp.395-406
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    • 2015
  • This research carried out an analysis on input cost and leakage reduction effect by leakage reduction method, focusing on the project for establishing an optimal water pipe network management system in the Taebaek region, which has been executed annually since 2009. Based on the result, optimal cost-benefit analysis models for water distribution network rehabilitation project were developed using DEA(data envelopment analysis) and multiple regression analysis, which have been widely utilized for efficiency analysis in public and other projects. DEA and multiple regression analysis were carried out by applying 4 analytical methods involving different ratios and costs. The result showed that the models involving the analytical methods 2 and 4 were of low significance (which therefore were excluded), and only the models involving the analytical methods 1 and 3 were suitable. From the result it was judged that the leakage management method to be executed with the highest priority for the improvement of revenue water ratio was installation of pressure reduction valve, followed by replacement of water distribution pipe, replacement of water supply pipe, and then leakage detection and repair; and that the execution of leakage management methods in this order would be most economical. In addition, replacement of water meter was also shown to be necessary in case there were a large number of defective water meters.

An Efficiency Evaluation of Korea's Electric Power Generation Industries using DEA model (DEA 모형을 활용한 국내 발전회사의 효율성 평가)

  • Koh, Seung-Churl;Sim, Gwang-Sic;Kim, Jae-Yun
    • Journal of the military operations research society of Korea
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    • v.34 no.1
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    • pp.61-77
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    • 2008
  • Data Envelopment Analysis(DEA) is a promising methodology to evaluate the relative efficiency of the decision-making units. We have compared the efficiency of six electric power generation companies in Korea using DEA. The analysis results by input-oriented CCR and BCC models are summarized as follows: first, different results were acquired between using input factors as total capacity of generators and as sub-totals of generator capacity based on primary energy sources. It is the result influenced by input factors which are characterized by the proportion of fixed costs(generating facilities) and variable costs(generation costs for primary energy), Second, the efficiency will be increased if the input factors selected, according to primary energy sources discussed in this research, are used during long-term expansion of electric power capacity plans. It is expected that this approach can give a feedback for management of electric power generation companies.

A Study on the Analysis of Management Efficiency of Start-up Investment Companies (창업투자회사의 경영 효율성 분석에 관한 연구)

  • Lee, Jun-Hyung;Yoon, Jun-Sang
    • Journal of Digital Convergence
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    • v.19 no.5
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    • pp.353-363
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    • 2021
  • This study analyzed to provide information for business improvement by analyzing the management efficiency of start-up investment companies so that startup investment companies can operate efficiently and by presenting information on inefficient factors. From 2014 to 2018, 83 start-up investment companies were analyzed using the DEA model. Input variables were he number of employees, capital, and output variables were selected for start-up investment assets, operating income, and net profit. As a result of the analysis, technical efficiency and pure technical efficiency showed a pattern with an increase in average, but scale efficiency repeatedly increased and decreased. It is believed that the decline in technology efficiency was due to the decrease in pure technology efficiency, and the inefficiency of start-up investment companies seems to have influenced the inefficiency of start-up investment companies rather than the inefficiency of scale. In addition, the size revenue shows that the DRS value is gradually decreasing, and the IRS value is generally increasing. It is believed that efficiency can be improved if operational inefficiency is improved based on the results and efficiency measures are established through scale expansion.

Analysis of Efficiency and Productivity for Major Korean Seaports using PCA-DEA model (PCA-DEA 모델을 이용한 국내 주요항만의 효율성과 생산성 분석에 관한 연구)

  • Pham, Thi Quynh Mai;Kim, Hwayoung
    • Journal of Korea Port Economic Association
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    • v.38 no.2
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    • pp.123-138
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    • 2022
  • Korea has been huge investments in its port system, annually upgrading its infrastructure to turn the ports into Asian hub port. However, while Busan port is ranked fifth globally for container throughput, Other Korean ports are ranked much lower. This article applies Data Envelopment Analysis (DEA) and Malmquist Productivity Index (MPI) to evaluate selected major Korean seaports' operational efficiency and productivity from 2010 to 2018. It further integrates Principal Component Analysis (PCA) into DEA, with the PCA-DEA combined model strengthening the basic DEA results, as the discriminatory power weakens when the variable number exceeds the number of Decision Making Units(DMU). Meanwhile, MPI is applied to measure the seaports' productivity over the years. The analyses generate efficiency and productivity rankings for Korean seaports. The results show that except for Gwangyang and Ulsan port, none of the selected seaports is currently efficient enough in their operations. The study also indicates that technological progress has led to impactful changes in the productivity of Korean seaports.

Management Efficiency of the Full-time and Part-time Oak Mushroom Farms using DEA models (DEA 모형을 이용한 주업과 겸업 표고재배 임가의 경영효율성 비교 분석)

  • Lee, Seong-Youn;Jeon, Jun-Heon;Won, Hyun-Kyu;Lee, Jung-Min
    • Journal of Korean Society of Forest Science
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    • v.103 no.4
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    • pp.639-645
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    • 2014
  • This study was conducted to evaluate the management efficiency of oak mushroom farms in Korea using the Data Envelopment Analysis (DEA), which is one of the non-parametric estimation methods. The data that was analyzed in this study was from the result of 2013 survey entitled "Standard Diagnostic Table for Oak Mushroom Management", which was conducted from March 2012 to October 2012. This survey was based on the inputs and outputs of 20 oak mushroom farms. Specifically, this study analyzed the technical efficiency, pure-technical efficiency and scale efficiency using CCR and BCC model of the DEA methods. Furthermore, this study compares the management efficiency between the full time oak mushroom production farms and part time oak mushroom production farms. Results showed that mean value for the technical efficiency was 0.655 which is considered as inefficient in general. For the pure-technical efficiency and scale efficiency, the mean values were 0.830 and 0.747, respectively which showed that inefficiency in the management was observed in the mushroom farms. Results also showed that there were seven farms with a total efficiency of 1, namely Decision Making Unit(DMU)2, DMU5, DMU6, DMU8, DMU10, DMU15 and DMU20. The management efficiency of DMU7 specifically the inputs for production was analyzed and compared to DMU5 and DMU6 and results showed that the DMU7 had an excessive inoculation and site development cost. Lastly, it was also observed that the full time mushroom production farms were more efficient as compared to the part time mushroom farms because of the lower scale efficiency value or smaller area for mushroom production allotted in the part time farms.

A Study of the Human Capital Efficiency in the Korean Online Game Business using Non-parametric Analysis Model(DEA) (비모수 분석모형(DEA)을 활용한 국내 온라인게임 기업의 인적자본 효율성 연구)

  • Yoon, Gun-Woo;Ryu, Seoung-Ho
    • Journal of Korea Game Society
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    • v.9 no.2
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    • pp.81-93
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    • 2009
  • This study aims to investigate human capital in Korea's online game industry (as the representative of IT-based creative services) under the knowledge-based economy paradigm. In recognition of the importance of intellectual capital closely intertwined with human capital and the economic potential of the online game industry, Korean government has begun to show active support. In this context, this study measures the human capital efficiency in online game business by using non-parametric analysis (Data Envelopment Analysis, DEA). Most previous studies (human capital theory, knowledge based economy theory, economic growth theory) have proved that human capital has a very positive effect on sustainable growth of corporate management and wealth of nations. As such, this paper uses the DEA to obtain the efficiency of the human capital (scale, investment, education, compensation). The results of this study will suggest strategic implications on maximizing the human capital in online game corporations and provide a reference frame for government policies.

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A Comparative Analysis of Container Terminal Operation in Busan and Kwangyang Port (부산항과 광양항 컨테이너 터미널 운영의 효율성 비교 분석에 관한 연구)

  • Ryoo Dong-Keun
    • Journal of Navigation and Port Research
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    • v.29 no.10 s.106
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    • pp.921-926
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    • 2005
  • The purpose of this paper is to conduct a comparative analysis of container terminal operation in Busan and Kwangyang port. The research method used for this study is DEA(Data Envelopment Analysis} and among DEA methods CCR and BCC model has been used. According to the results of CCR model Gamman in 2004 and Gamcheon in 2004 are found to be the most efficient terminals in the sample and the inefficient terminals include Gwangyang Phase 2 terminal. Based on BCC model Gamcheon and Uam are identified as the most efficient terminals in three consecutive years including Gamman terminal in 2004. The inefficient terminals include New Gamman in 2002 and Hutchison in 2002. The research findings show that inefficient terminals need to fully utilise their terminal facilities and increase container throughput through effective marketing activities.

A Study on the Operational Efficiency Analysis of University Libraries (대학도서관 운영의 효율성 분석에 관한 연구: A대학도서관을 중심으로)

  • Park, Hyun Young;Rhee, Hey Young
    • Journal of the Korean Society for information Management
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    • v.33 no.1
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    • pp.139-160
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    • 2016
  • This study suggested improvements after analyzing the effectiveness of "A" university library. So, this study analyzed the effectiveness of E-group "A" university, and measured the effectiveness, classifying with three conditions about input & output and factors and conditions about regional categories. As a result, it is necessary to operate E-group 38 university libraries and "A" University library by increasing input factors to increase outputs. The improvements are as followings. First, it is necessary to stir up member's recognition on libraries. To this, there is a legal system for university library. Second, it is necessary to include library use education in curriculum. Third, it is necessary to prepare complex space so that the members can borrow books and use it for cultural space and rest space.

An Empirical Study on the Feasibility of Eco-efficiency for Sustainable Development between Korea and China (한중간 지속가능발전의 타당성에 관한 실증분석)

  • Choi, Yongrok
    • International Area Studies Review
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    • v.14 no.3
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    • pp.205-219
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    • 2010
  • In general, industrial production involves large amounts of harmful by-product, causing serious pollution and ecological risk. Eco-efficiency, which indicates how efficient the economic activity is by considering both the environmental risks and economic performance, is a new concept for economic sustainability analysis and quantitative ecological risk analysis. Data envelopment analysis (DEA) has been widely used to examine eco-efficiency in recent years. Whereas traditional DEA models such as CCR and BCC model neglect undesirable outputs, this paper adopts a stochastic undesirable-output DEA model to measure the eco-efficiency of each province of China and Korea. The results indicate that whereas the eco-efficiency of the eastern region was the highest, that of the western region was the lowest. The reason may come from the negative external dis-economies of environment. And thus the governmental efforts for outreach on the underdeveloped regions should be promoted.

An Empirical Study of the Determinant Factors of Banking Efficiency of China (중국 은행효율성의 결정요인에 관한 실증적 연구)

  • Cho, Dae-Woo;Zhu, Hui-Qin
    • International Area Studies Review
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    • v.12 no.2
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    • pp.79-97
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    • 2008
  • After entering into the WTO in October, 2001, China started opening her bank industry on a full scale and her financial markets from the end of 2006. It is true that the Chinese commercial banks should make efforts to enhance their operational efficiency for adapting the rapid change of financial environments. In this paper, the efficiency of 4 Chinese state-owned commercial banks and 11 share holding commercial banks has been estimated. Our Tobit model to find out the determinants of these banks' efficiency. The results are as follows: The efficiency of these banks kept being improved from 1999 to 2003. With regard to the relationship between the determinants and the bank efficiency, their capital ratios, ownership structures and government subsidies are significant at the 5% level while the return on asset(ROA) is significant at the 10% level. The relationship between the determinants and the efficiency has showed that the size, capital ratios, ROA and ownership structure showed significantly before the entry to WTO, on the other hand, after WTO their capital ratios are the only factor to determine their efficiencies.