• 한국가스학회지
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• 제22권2호
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• pp.21-28
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• 2018

최근 셰일가스 생산량의 급증에 따른 유 가스 가격 하락이 셰일가스 생산의 채산성 악화를 초래하여 셰일가스 개발 시 신뢰성 있는 경제성 평가가 중요해졌다. 따라서 이 연구에서는 확률론적 분석 기법 중 몬테카를로 시뮬레이션을 적용하여 셰일가스 개발 시 수반되는 불확실성을 고려한 경제성 분석을 수행하고자 하였다. 이를 위해 주요 변수들의 범위를 설정한 후 난수를 발생시켜 순현재가치(Net Present Value, NPV)와 내부수익률(Internal Rate of Return, IRR)의 확률분포를 도출하였고, 연구대상지역에서의 셰일가스 개발 시 사업 타당성이 긍정적으로 판단되는 확률을 추정하였다. 또한 셰일가스 개발 시 경제성에 영향을 미치는 주요 변수에 대한 민감도 분석을 수행하여 상업적인 생산을 위한 경제성 평가 시 주요 변수들의 영향을 파악하였다. 향후 대상지역의 경제성 지표 변동범위와 확률 값을 도출하는 이 연구의 결과는 셰일가스 생산을 위한 의사결정에 활용될 수 있을 것으로 사료된다.

• 한국경영과학회지
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• 제32권2호
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• pp.163-175
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• 2007

[ $ulcorner$ ]Cost-Effectiveness Analysis$\lrcorner$ has been wifely used to evaluate economic efficiency of R&D projects, but most of cost-effectiveness evaluation systems have some problems such as systematic method for setting and evaluating cost factors, estimation of single effect on each R&D project, and estimation of cross effects among R&D projects. To solve these problems, we have designed a new evaluation indicator called a $ulcorner$Cost-Cross Effect Integration Indicator$lrcorner$ including cross effects developed in this research. The major research findings are summarized as follows : (1) $ulcorner$Coist Estimation Model$lrcorner$, which estimates the cost factors divided into two classes of assembly product and system product and then integrates the total cost values, has been designed. (2) A new method for estimating parameters of cross effects among R&D projects has been developed. (3) $ulcorner$Cross Effects Estimation Model$lrcorner$ to estimate multi-effects and cross effects by completion time among several projects has been designed. (4) $ulcorner$Integration Estimation Indicator$lrcorner$ for setting priority on a project group has been extracted by combination of total cost value and total effect value.

• 한국항해학회지
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• 제8권1호
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• pp.17-48
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• 1984

The economy of ship's size and speed is affected by the freight rates, sailing distances, cargo handling rates, fuel oil prices and even interest rates of the borrowed funds. It can be a step more powerful measures if the economic evaluation model takes in a cargo lot size which prevails in the shipping markets. This paper has dealt with hypothetical cargo lots which happen to the market with uniform distribution in probability. The evaluation models are either profit maximization method or cost minimization method. The former compares among different voyages in profitability to the invested funds, the later defines the transportation efficiency in ton-mile unit and be used in comparing two or more transportation means. This paper adopted both of above methods to derive out ships economical evaluation contours for the various ship's speed and deadweight for certain cargo lot sizes, which can be used as important managerial decision data in purchasing ships or selecting a most profitable one among the proposed voyages. This evaluation contours will also be efficiently used in appraising so called "handy size ships" in connection with port water depth and conditions of voyage tracks.ge tracks.

• 한국농공학회논문집
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• 제64권5호
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• pp.41-51
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• 2022

Carbon neutrality is emerging as a new paradigm for the international society by transiting from climate change to climate risk. This study proposes evaluation methods for the carbon reduction contribution of climate-related national R&D projects in order to introduce a green budget system in the agricultural sector. We considered the domestic and foreign green budget systems and classified national R&D projects into positive, negative, and neutral from the perspective of carbon reduction. The results of this study propose three methods to estimate the monetary costs and carbon benefits by adopting the framework for the economic evaluation of national R&D projects conducted by the Rural Development Administration. These methods support to evaluate the potential contribution to carbon reduction of national R&D projects in the agricultural sector. Finally, the proposed methods were tested and verified for the efficiency and validity of evaluating carbon reduction contribution. These evaluation methods of the carbon reduction contribution can be used as a basic methodology for the pre-budget calculations of national R&D projects and the contribution for the greenhouse gas reduction budget.

• Asian-Australasian Journal of Animal Sciences
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• 제12권8호
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• pp.1316-1323
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• 1999

Extensive emphasis on milk and milk fat yields with no diversion for beef performance increased the yield efficiency of North American dairy cattle. Heavy demand for North American genetics followed national strain comparison trials in Poland, and US and Canadian dairy cattle and germplasm still are an important source of genetics for many countries. Genetic improvement has accelerated in many countries because of the implementation of sampling programs for young bulls and improved evaluation procedures. Rapid access to information and more frequent calculation of genetic information also are having a positive impact on genetic improvement. Traits other than yield should be considered in a breeding program, but those traits mist have a reasonable opportunity for improvement and sufficient economic worth. Because of ever increasing efficiency, the world's milk supply comes from fewer cows each year. However, no decline in the rate of genetic improvement is apparent under current genetic practices; estimates of heritability are increasing, and a decline in yield efficiency is unlikely in the near future. As management improves, especially for subtropical conditions, many of the selection principles used in temperate climates will be adopted for more adverse environmental conditions.

• 대한산업공학회지
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• 제36권1호
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• pp.32-41
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• 2010

DEA(Data Envelopment Analysis) is the relative efficiency measure among homogeneous DMU(Decision- Making Units) which can be used to useful tool to improve performance through efficiency evaluation and benchmarking. However, the general case of DEA was considered as unrealistic since it consists a benchmarking regardless of DMU characteristic by input and output elements and the high efficiency gap in benchmarking for inefficient DMU. To solve this problem, stratification method for benchmarking was suggested, but simply presented benchmarking path in repeatedly applying level. In this paper, we suggest a new method that inefficient DMU can choice the optimal path to benchmark the most efficient DMU base on the similarity among the input elements. For this, we propose a route choice method that combined a stratification benchmarking algorithm and SOM (Self-Organizing Map). An implementation on real environment is also presented.

• 설비공학논문집
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• 제24권3호
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• pp.205-211
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• 2012

Unlike the previous approaches, we analyzed for economic efficiency of renewed heating and cooling systems as the characteristics of space. The purpose of this study is to analysis the energy consumption and economical efficiency of absorption chillers and EHP systems in renovated library. It is important that equipment selection should be considering energy cost as well as space program. In recently, many EHP systems were installed in the building for reducing the energy cost and for seeking the convenience of individual control. In contrast, though absorption chillers have the disadvantage of a central control, absorption chillers are appropriate for the conditions of the library that needs simultaneous operation. The results by payback period method, show that selection of heating and cooling systems should be consider for space program and the characteristics of space.

• 한국산학기술학회논문지
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• 제14권7호
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• pp.3232-3237
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• 2013

이 연구는 농촌진흥청 국립원예특작과학원 감귤시험장에서 개발된 감귤 다공질 필름 멀칭 재배법의 기술가치를 평가하는데 있다. 이 연구는 농업 R&D사업의 효율성과 실용성 제고를 위한 기초자료로 이용될 수 있을 것이다. 분석결과에 따르면, 감귤다공질 필름 멀칭 재배법 개발에 따른 기술가치평가액은 할인율 수준에 따라 최소 421.64억원(할인율 10%)에서 최대 550.18억 원(할인율 6%), 평균 480.34억 원(할인율 8%)으로 추정되고, 내부수익율 IRR의 값은 예상했던 할인율(6%~10%)보다 크고, 순현재가치(NPV)는 영보다 크며, B/C 비율도 20 이상으로 나타나 감귤 다공질 필름 멀칭 재배법 개발사업의 경제적 타당성은 있는 것으로 평가된다.

• 한국산학기술학회논문지
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• 제15권1호
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• pp.243-248
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• 2014

본 연구의 목적은 농촌진흥청 국립원예특작과학원 감귤시험장에서 개발된 감귤의 플라보노이드 성분의 추출 및 정제방법 개발의 기술가치를 IRR, NPV를 통해 평가하는 것이다. 이는 농업 R&D사업의 효율성과 실용성 제고를 위하여 이용될 수 있을 것이다. 분석결과에 따르면, 감귤의 플라보노이드 성분의 추출 및 정제방법 개발에 따른 기술 가치평가액은 3,155 백만원 ~ 6,518 백만원으로 추정되고, 추출물 적용단가에 따라 순현재가치는 5,541~18,773백만원, 내부수익율 IRR은 할인율(11.9%)보다 큰 28.3%~61.2%로 높게 나타나 경제적 타당성이 높은 것으로 평가된다.

• 한국산학기술학회논문지
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• 제15권11호
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• pp.6652-6658
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• 2014

본 연구의 목적은 농촌진흥청 국립원예특작과학원이 개발한 유용미생물을 이용한 친환경방제기술, 구체적으로 얘기하면 버섯 갈반병에 대한 길항미생물 HC5를 이용한 방제기술개발의 기술가치를 평가하는 것이다. 이는 농업 R&D사업의 효율성과 실용성 제고를 위하여 이용될 수 있을 것이다. 분석결과에 따르면, 유용미생물을 이용한 버섯의 친환경방제기술개발의 기술가치평가액(할인율 7.3% 기준)은 최대 1,826.4억원, 최소 881.4억원으로 평균 1,353.9억원으로 추정된다. 내부수익률 IRR의 값은 최소 1,958.5%, 최대 4,054.4%, 평균 3,006.5%로 가정했던 할인율(6%~10%)보다 훨씬 크고, 순현재가치(NPV)는 영보다 훨씬 크며, B/C 비율도 평균 180 이상으로 나타나 미생물을 이용한 버섯의 친환경방제기술개발 사업의 경제적 타당성은 매우 높은 것으로 판단된다.