• 품질경영학회지
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• 제40권1호
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• pp.39-48
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• 2012

An early detection system for warranty issues periodically collects customers' claim data and automatically reports alarms about emerging issues based on statistical algorithms. It helps companies to reduce an issue definition time and save the handling cost of warranty claims. This paper provides an evaluation framework to validate the economic effect of an early detection system project. For this purpose, we present economical index of a project with explicit formulas such as ROI(return on investment), PP(payback period), NPV(net present value), PI(profitability index) and IRR(internal rate of return) and analyze the sensitivities of the index according to the variation of project input parameters. The proposed analysis framework is expected to be used for evaluating economic values of various system integration projects.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(II)
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• pp.40-45
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• 2003

Korea selected to introduce high-speed railway system from advanced countries in order to accumulate railway technologies and develop exiting domestic logistics system. After many twists and turns, we adopted to introduce France's high-speed railway called 'TGV'. Despite many difficulties along with trials and errors, it is expected that Korean high-speed railway will be brilliantly launched in April 2004, although it has been commissioned for multi-discipline tests. It is forecast that the opening of high-speed railway will bring us the epoch-making development of logistics system. However, what if there are really some problems in the operation of high-speed railway? We cannot consider and highlight only the positive aspects of our own high-speed railway. In terms of many challenging aspects we would face in the future, there would be some matters we must consider and point out in this opportunity. In this regard, the direction for developing high-speed railway stations requires the harmony between profitability and public benefits, which must involve compatibility with other traffice systems and practical policies to secure competitive edges.

• 산업경영시스템학회지
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• 제2권2호
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• pp.53-62
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• 1979

A widely accepted indicator of a project's economic potential is the internal rate of return (IRR). The primary objective of feasibility analysis for any project is to measure the economic potential for the project, normally defined as the expected return on capital investment. The analysis should be designed to determine whether a project is technically and economically sound, and under what conditions. Therefore, there are factors other than economic potential that must be taken into account in the reasonable composition of an investment program. These kinds of factors can be given proper consideration in project selection after the economic feasibility of alternative projects has been determined. The primary reason for having to choose among different projects is that capital resources are scare : the investment budget is limited. The case project, casting facilities investment project, treated in this paper were selected for their value in illustrating the methods of feasibility analysis. This case project an actual potential project and is analyzed on the basis of the best available data for the specific conditions for that project.

• 대한건축학회연합논문집
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• 제20권6호
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• pp.105-112
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• 2018

The purpose of this study is to develop an application that supports a user in the maintenance of small photovoltaic device. To this end, this study analyzed the maintenance status, related regulations and existing application contents in Korea. According to the analysis results, most users did not maintain device for themselves. In addition, the maintenance market has not been activated due to its low profitability. Regulations on the maintenance of photovoltaic device prescribed by the KESCO and Japanese counterpart were analyzed to establish the standards for photovoltaic device inspection, and an application was developed based on the existing applications and research results. In order to evaluate the completeness and satisfaction of the developed application, it surveyed 52 users and 22 experts. The survey results showed that the completeness was calculated to be 90 points, and the level of satisfaction was 93 points on a 100-point scale. Therefore, it is expected that the maintenance application developed in this study will be useful for users to maintain the photovoltaic device.

• KDI Journal of Economic Policy
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• 제42권4호
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• pp.117-138
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• 2020

Few studies have specifically focused on the uncertainty of demand forecasting despite the fact that uncertainty is the one of greatest risks for governments and private partners in PPP projects. This study presents a methodology for finding robust contract conditions considering uncertainty in travel demand forecasting in a PPP project. Through a case study of an urban railway PPP project in Korea, this study uncovered the risk of excessive government payments to private partners due to the uncertainty in contracted forecast ridership levels. The results allow the suggestion that robust contract conditions could reduce the expected total level of government payments and lower user fees while maintaining profitability of the project. This study offers a framework that assists contract negotiators and gives them more information regarding financial risks and vulnerabilities and helps them to quantify the likelihood of these vulnerabilities coming into play during PPP projects.

• 한국IT서비스학회지
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• 제15권1호
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• pp.227-243
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• 2016

In order to maximize profitability by optimizing the entire supply chain process, enterprises have made efforts to apply IT technologies such as POS, MES, and TMS. In addition, academic societies have also made efforts to verify the effects of IT technology introduction through various researches. However, until now, there is almost no research that analyzes the relationship between the IoT, a new IT technology, and the SCM. To study the effect of IoT technology on SCM, this study conducted professional Delphi surveys for three times. Through this method, this study analyzed changes that will be caused by the IoT technology, the priority area in IoT introduction, and the expected difficulty in IoT introduction on SCM. As a result of the Delphi surveys and analyses, it was expected that when IoT technology is introduced, the level of SCM's IT use and partnership will increase. However, the effect of the increased performance of the supply chain, which includes inventory management and quality control, will become weaker. The reason is that the development of operation and management skills, as well as the improvement of IT technology, are also important elements for the performance improvement of the supply chain. As for the priority area in IoT introduction, it was expected that the effect will be greater when IoT is introduced in customer service, transportation, and delivery areas. As difficulties in IoT technology introduction, such as the shortage of IoT platform development personnel, standardization, integration with the existing system, securing professional manpower, expenses, data management, and operation, were derived, it has thus become necessary for us to exert greater efforts in order to come up with solutions.

• 한국ITS학회 논문지
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• 제20권5호
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• pp.157-171
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• 2021

스마트폰 보급과 ICT 기술을 발전에 따라 택시영업의 형태는 배회영업에서 플랫폼 기반 영업으로 변화해왔다. 이는 이용자의 이동성 및 접근성을 향상시키는 장점을 갖고 있지만 반대로 단거리 및 첨두수요 시간대의 간접 승차거부 등의 문제를 지속적으로 발생시키고 있다. 간접승차거부는 호출이 발생했을 때 이를 무시하고 수락하지 않는 경우를 의미하며 이를 개선할 필요가 있다. 이에 본 연구에서는 택시 운행 데이터를 통해 강화 학습 기반 호출 간 기대수익 조정 시뮬레이션을 수행하여 택시 수급의 불일치 완화 방안을 도출하고자 한다. 분석 결과 운행 완료율에 따라 인센티브 지급을 할 경우 평균 운행 완료율이 50.29%에서 54.24% 수준까지 증가함을 확인하였으며 5,000원 미만 단거리 구간에서 5.86%의 개선 효과를 도출하였다. 운행 완료율의 개선으로 운전자에게는 수익성 개선, 승객에게는 대기시간 감소의 편익을 줄 수 있을 것으로 기대되며, 택시 서비스 전반의 만족도 향상이 나타날 것으로 사료된다.

• 유통과학연구
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• 제15권12호
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• pp.95-102
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• 2017

Purpose - This study aims to develop diagnostic indices for managerial performance of agro-food distribution corporations. In particular, weights of diagnostic indices were estimated using the AHP method. Management diagnosis on agro-food distribution corporations is expected to increase their competitiveness in the domestic market as well as in international markets. Research design, data, and methodology - It develops weights or importance of the diagnostic indices based upon the survey of 21 experts in food distribution management. The survey was carried out using e-mail. Management diagnostic indices were developed based upon four BSC(Balanced Scorecard) perspectives of finance, learning/growth/leadership, customer, and internal process/technology. Results - Diagnostic indices on financial perspective consist on profitability, productivity, growth, stability and activity. Learning and leadership perspective indices consist of management will, CEO leadership, level of learning, innovation, and level of management information system. Customer perspective indices are branding, customer and channel management and internal process/technology indices consist of fourteen sub-indices representing technologies, efficiency, and dynamics. It was estimated that the weight of financial perspective index was 0.3, internal process/technology perspective index 0.248, customer category index 0.247, and learning, growth and leadership perspective index 0.205. This study also estimates weights of sub-indices for managerial diagnosis by four different perspectives. Estimated weight of profitability (0.085) is the greatest among financial perspective indices, followed by stability (0.072), growth (0.053), productivity (0.051), and activity (0.038). While estimated weights of leadership, capability, and information indices are 0.100, 0.061, and 0.044 respectively, weights of marketing, customer management, and quality and service indices are 0.104, 0.093, and 0.051, respectively. Among internal process/technology perspective, estimated weights of efficiency, technology, and innovation indices are 0.106, 0.088, and 0.054, respectively. Conclusions - The diagnostic indices for managerial performance of agro-food distribution corporations would be utilized by agro-food distribution corporations themselves, extension service institutions, and consultants. It is also expected that central and local governments use diagnostic indices developed in this study for the purpose of evaluating the effects of governmental support programs for agro-food distribution corporations. Futhermore researchers and consultants would modify diagnostic indices developed in this study, reflecting characteristics and situation of types of agro-food distribution corporations.

• KDI Journal of Economic Policy
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• 제12권2호
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• pp.95-120
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• 1990

비상장기업(非上場企業)이 최초로 주식시장(株式市場)에 발행하는 신주(新株)가 실제가치에 비해 낮은 가격(價格)에 상장(上場)되는 신주(新株)의 저평가현상(低評價現象)이 번번히 일어나고 있으나 아직 그 원인(原因)이 명확히 밝혀지고 있지 않다. 또한 신주발행(新株發行)을 통한 자본조달(資本調達)의 효율성(效率性)에 관한 기존(旣存)의 연구도 전무(前無)하다. 본고(本稿)에서는 기업(企業)의 수익성(收益性)에 관하여 기업주(企業主)의 우월(優越)한 정보(情報)를 가정한 신호경기적(信號競技的) 모델의 분석(分析)을 통하여 신주(新株)의 저가상장(低價上場) 원인(原因)을 밝혀내고 아울러 신주발행(新株發行)을 통한 자본조달(資本調達)의 효율성(效率性)을 검토해 보았다. 모델의 분리균형(分離均衡)의 분석(分析)을 통해 밝혀진 주요 결과는 다음과 같다. 고수익성(高收益性)프로젝트를 가진 기업주(企業主)는 프로젝트가 저수익성(低收益性)인 경우에는 선택할 유인(誘因)이 없는 발행조건 중 자신에게 가장 유리한 조건을 선택함으로써 투자자들에게 기업이 고수익성(高收益性)임을 입증(立證)하고자 하며 이 과정에서 선택된 고수익성기업(高收益性企業)의 발행조건의 성격은 다음과 같다. 첫째, 넓은 범위와 모수(母數)값에 대해 신주가격(新株價格)은 판매대금(販賣代金)이 기업(企業)에 유입(流入)된 이후 1주(株)에 해당하는 기업(企業)의 가치에 미달한다. 둘째, 기업(企業)에 유입(流入)되는 자본(資本)은 프로젝트로부터의 잠재적(潛在的) 이윤(利潤)을 극대화(極大化)하는 액수에 미달한다. 따라서 신주(新株)의 저가상장(低價上場)은 고수익성기업주(高收益性企業主)의 신호행위(信號行爲)의 결과이며 또한 신주(新株)의 저가상장(低價上場)은 저투자(低投資)를 의미한다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2005년도 춘계학술대회
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• pp.482-486
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• 2005

Total forest growing stock and growing stock per ha in Korea are $470\times10^6m^3\;and\;73m^3$, respectively. Those figures mean that forest growing stock was increased 4.7 times more during last 30 years. The annual production of forest biomass comes from forest tending executed by Korea Forest Service was estimated about $1.07\times10^6m^3$ M/T, which was equivalent to $0.45\%$ of total imported crude oil of Korea at 2002. The production is expected to increase and reach up to $1.9\times10^6 M/T$ till 2008. The analysis of economic feasibility showed that the production cost of wood chip(134,786Won/T) was about 30,389 Won/T higher than heat value of wood chip, 104,397 Won/T estimated from that of kerosene. For the promotion of forest bioenergy utilization, more efforts need to be given for the education and public relations to induce publicity a willingness-to-pay for the environment friendly fuels under the good understanding for the use of bioenergy. In addition, we need to provide a community-based biomass utilization program by region to allocate the role of each participant and to increase the profitability of bioenergy.