• 한국경영과학회지
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• 제24권4호
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• pp.95-109
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• 1999

We propose a series of methodologies that can evaluate relative efficiency of logistics units(centers) in three categories; managerial, cost, and operational efficiency. Inputs and outputs of logistics systems are first defined. Appropriate quantitative and qualitative measures for the three categories are then selected. Employed also are Analytic Hierarchy Process, Weighted Scoring Method, Stochastic Frontier Model, and Data Envelopment Analysis for the development of a comprehensive assessment scheme. Our scheme not only assesses the degree of relative efficiency of logistics units but also identify the sources of inefficiency in each unit The methodologies are applied to a large telecommunications company which operates 12 distribution centers nation wide. Relative efficiencies of the centers are compared using 1995-1997 performance data. Summarized are the level of efficiency of each distribution center for each of the three categories. The degree and sources of inefficiency of each distribution center are also discussed.

• Journal of Korea Trade
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• 제26권3호
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• pp.23-44
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• 2022

Purpose - Recent issues such as vessel enlargement, strengthening of environmental regulations, and port smartization are expected to increase costs and intensify competition in the port industry. In the new normal era, when external growth has reached its limit, the efficient operation of ports is becoming indispensable for achieving sustainable growth. This study aims to identify the determinants of inefficiency by examining the cost structure and efficiency of container terminals in Korea and furthermore propose the political implications to derive the maximization of efficiency. Design/methodology - This study estimates the cost function of container terminal operators and identifies the efficiency of container terminals using stochastic cost frontier (SCF) in the first stage. In the second step, the SCF results are compared with the data envelopment analysis (DEA). Last, this paper proposes efficiency determinants on container terminal operation to establish appropriate strategies. Out of the 29 container terminal operators in South Korea, 13 operators participated in the survey. The translog cost function was estimated utilizing a total of 116 observations collected over the 2007-2017 period. Findings - Empirical analysis shows that economies of scale exist in Korea's container ports, which provides a rationale for the government's policy to establish the global terminal operator by integrating small terminal operators to enhance competitiveness. In addition, as a result of the determinants analysis, container throughput, weight of direct employment costs, and labour cost share have positive effects on improving cost efficiency, while inefficiency increases as the length of quay increases. More specifically, cost efficiency improves as the proportion of direct employment costs to outsourcing service costs increases. Originality/value - This study contributes to analyzing the inefficiency factors of container terminals through efficiency analysis with respect to a cost function. In addition, this study proposes the practical and political implications, such as establishing a long-term manpower pool, the application of the hybrid liner terminal system, and the construction of a statistical data system, to improve the cost inefficiency of terminal operators.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 춘계 학술논문 발표대회
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• pp.151-152
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• 2012

Recently, there are growing interests in building LCCO₂ Assessment to reduce carbon emissions. However, existing methods of assessment system include inefficiency in the process of CO₂ calculation requiring considerable data input. Therefore, the purpose of this study is to develop an efficient building assessment system appropriate to material production in construction stage. To that end, quantity input technology was limited to data mapping. Also quantity calculation based on work breakdown structure and item codes consisted of hierarchical structure that is based on facet classification were analyzed. As a result, connectivity links of quantity calculation and CO₂ functional units through item codes for data mapping, and assessment system including calculation and database parts were developed.

• 아태비즈니스연구
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• 제6권2호
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• pp.1-17
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• 2015

This study compares the most widely used parametric and non-parametric techniques to measure cost and profit efficiency of banks, namely the Stochastic Frontier Analysis (SFA) and Data Envelopment Analysis (DEA). We formulate the specification form of both stochastic cost and profit frontier models and constant return to scale Cost DEA and Profit DEA models and provide an empirical assessment of the cost and profit frontiers based on a panel dataset of National Commercial Banks (NCBs) and Private Banks (PBs) in Bangladesh over the 2001-2010 period. The cost inefficiency and profit efficiency are slightly higher for PBs than NCBs in case of both SFA and DEA. The coefficients of advance and off-balance sheet items are significant that positively influence the banks in stochastic cost frontier model while the advance, other earning assets, price of borrowed fund are significant and negative effects on the banks in stochastic profit frontier model. The average cost inefficiency and average profit efficiency are recorded with 16.3% and 91% respectively. The highest and lowest cost inefficiency are observed for Janata Bank and United Commercial Bank Limited whilst the highest and lowest profit efficiency are recorded for Eastern Bank Limited and Janata Bank respectively. The average technical and allocative efficiency are 68.8% and 35.9%, respectively in case of CRS cost-DEA model whereas they are 70.3% and 31.8% in case of CRS profit-DEA model. The average cost inefficiency is recorded 6.3% by SFA whereas it is 24.5% by DEA. The average profit efficiency is found 91% by SFA while it is 22.1% by DEA, and SFA method shows better bank efficiency than DEA.

• 한국지리정보학회지
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• 제8권1호
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• pp.1-12
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• 2005

토지적성평가는 공간계획에 있어서 실질적인 전략영향평가의 역할을 담당할 수 있으며, 2003년부터 국토계획법에 의하여 시행되고 있다. 토지적성평가는 토지의 물리적 사회적 공간적 특성에 따라서 개발사업의 시행 이전에 토지의 용도를 평가하는 과정이다. 토지의 특성을 파악하기 위해서는 지리정보를 기반으로 한 디지털 DB의 활용은 필수적이며, 법률상으로도 GIS를 활용하도록 규정하고 있다. 이 연구에서는 전라남도 지역의 교외지역을 대상으로 사례연구를 통하여 토지평가를 실시하고, 그 결과를 바탕으로 GIS의 측면에서 토지평가제도의 효율성과 실행성을 강화시킬 수 있는 방법론을 모색하였다.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2004년도 추계 종합학술대회 논문집
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• pp.170-174
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• 2004

공간계획에 있어서 실질적으로 전략영향평가의 역할을 담당할 수 있는 토지적성평가가 2003년부터 지방자치단체를 중심으로 시행되고 있다. 토지적성평가는 토지의 물리적 사회적 공간적 특성에 따라서 개발사업의 시행 이전에 토지의 용도를 결정하는 과정이다. 이 과정에서 토지의 특성을 파악하기 위하여 지리정보콘텐츠를 중심으로 하는 디지털DB의 활용은 필수적이며, 법률상으로도 GIS를 활용하도록 규정하고 있다. 그러나 지자체의 여건은 아직 이 제도를 실시하기 위한 물적 인적 기반이 미비한 상황이다. 이러한 문제를 개선하기 위하여, 이 연구에서는 사례연구를 통하여 토지평가를 실시하고, 이를 바탕으로 토지평가제도의 효율성과 실행성을 제고할 수 있는 방안을 강구하였다.

• 자원ㆍ환경경제연구
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• 제23권3호
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• pp.453-472
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• 2014

2015년부터 도입예정인 탄소 배출권거래제의 파급효과를 분석하는 데 있어서 산업별, 기업별 $CO_2$ 저감비용에 대한 정확한 산정이 요구된다. 기업이 환경규제 등 제약된 환경에서 생산 활동을 할 경우 생산요소의 투입과정에서 비효율적 배분으로 인한 생산비용의 증가가 초래되어 비용최소화 달성에 실패할 개연성이 높아진다. $CO_2$ 암묵가격을 측정한 기존 거리함수접근법은 투입요소 간 비효율적 배분 비용을 반영하지 못함에 따라 $CO_2$ 저감비용을 과소평가할 수 있다. 본 논문에서는 이러한 거리함수접근법의 한계를 극복하기 위하여 국내 철강업을 대상으로 비용함수접근법을 사용하여 1990-2010 기간 동안 투입요소 간 비효율적 배분 여부를 검증하고, $CO_2$ 한계저감비용을 추정하였다. 투입요소 간 배분 효율성 달성은 기각되었으며, 표본기간 동안 $CO_2$ 1톤 감축하는 데 연평균 92,000원의 비용을 지불한 것으로 나타났다.

• 의료법학
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• 제10권2호
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• pp.37-82
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• 2009

Korea has gained the much more performances in the fields of pubic health laws and related policies on the basis of the substantial economic achievements. In 1977, the social medical insurance was established for companies with more than 500 employees, and in 1989, Korea successfully achieved the national medical insurance system covering the total population within only 12 years beginning with multiple insurers. There remained some problems, however, to be improved such as both the low level of contribution rates and benefit packages due to the inefficiency in utilizing limited medical resources. In 2000, all insurers were unified into a single insurer (National Health Insurance Corporation), and special independent Health Insurance Review & Assessment Service (HIRA) was also established. From the origin of medical insurance system in 1977, the Korean reimbursement system has been fee-for-service system, and after the establishment of HIRA, it has been providing objective and expert medical cost review services and health quality assessment services.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2022년도 춘계학술대회
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• pp.201-203
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• 2022

Increasing global market of used electric vehicle (EV) battery encourages international firms to establish its subsidiary companies or business units specializing in battery recycling. Such kind of companies predominantly use closed loop supply chain (CLSC) for their operations of battery manufacturing and used battery recycling/reusing in global scale. However, EV battery recycling, as a relatively new industry, makes its global CLSC be exposed to various types of risks, which leads to inefficiency of supply processes and makes supply chains more complicated and vulnerable. Identifying, evaluating, and analyzing possible risks in CLSC has a great importance for optimization and increasing effectiveness for the global supply chain of used EV battery. Itwill assist to elaborate the efficient CLSC management and possible risk mitigation strategies to keep the global EV battery supply chain resilient and sustainable. This study aims to develop a conceptual framework for risk assessment in this new sector. Therefore, it will populate the framework with possible failure modes identified from various literature on EV battery recycling and closed loop supply chains so that future research can validate and utilize the conceptual framework.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
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• 제3권1호
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• pp.23-30
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• 2014

본 논문에서는 가상화 환경에서 호스트 기반 취약점 분석 시스템의 에이전트 프레임워크를 제안한다. 기존 호스트 기반 취약점은 점검 대상 시스템에 에이전트를 반드시 설치하여 운용해야만 했지만 제안한 에이전트 프레임워크는 점검 대상 가상머신에 에이전트를 복사 및 실행하는 개념을 가진다. 본 논문에서는 가상화 환경에서 호스트 기반 취약점 분석 시스템 에이전트 프레임워크를 수립하였으며 점검 시나리오를 기술하고 해당 시나리오에 대한 파일럿 시스템을 개발하였다. 제안하는 에이전트 프레임워크는 점검 대상 시스템 추가 시에도 에이전트의 추가 설치가 없어 시스템 확장성을 극대화하였으며 에이전트의 불필요한 자원 낭비 등 기존 시스템의 단점을 개선하였다.