• 한국시스템다이내믹스연구
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• 제4권2호
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• pp.95-130
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• 2003

The purpose of this study is to find what causes make public projects hold off, going beyond the planned deadline and budget. Using System Dynamics(SD) and their derivative Urban Dynamics(UD) models, it intends to analyze major feedback loops based on VENSIM and to simulate them with STELLA software, all of which are interrelated with various causes of project delay. To prevent or ameliorate project delay, first of all it advises to focus on endogenous delaying factors not exogenous ones. These factors either reinforce or balance certain loops in complex causal structure, In the case example on the Cremation Building Project in Cheongju, Residents’ participation demand make negotiation put off and delayed negotiation reinforces administrative-expediency planning in order to observe a time limit, on the other hand, once building consensus, it increase both the level of planning performance and public trust. In the meantime, the real planning process used to neglect residents opinions and manage public grievance only through compensation, he a result of simulation, visible fruit of negotiation in the initial phase seems to be not satisfactory owing to funds and time consumed, but after reaching an mutual agreement among stakeholders, planning performance is effective and strategic than administrative-expediency planning viewed in both financial and time angle. It proposes to devise specific tools schematizing project implementation. In order to upgrade the quality of project management, it recommends for planners to adopt key concepts based on SD/UD diagrams and causal loops, which would contribute to enriching Planning abbots.

• 반도체디스플레이기술학회지
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• 제12권1호
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• pp.15-21
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• 2013

In this paper, sensor system and inspection algorithm in order to inspect steel balance weight for automobile is described. Steel balance weight is composed of clip and weight, which is joined by press process. The defective one has a gap between clip and weight. To detect whether there is a gap, sensor system is simply configured with laser line projector and USB camera, which make it possible to measure the height difference of clip and weight area. Laser line pattern which is made on the surface of a balance weight is captured by USB camera. In case that USB camera is used in machine vision, barrel distortion caused by wide angle lens makes the captured image distorted. Image warping function is applied to correct the distortion. Simple image processing algorithm is applied to extract the laser line information and whether it is good or not is judged through the extracted information.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집D
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• pp.343-347
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• 2001

Advanced Pressurized Reactor 1400(APR-1400), which is a standard evolutionary advanced light water reactor(ALWR), has been developed from 1992 as one of long-term Government Project(G-7). The APR-1400 is designed to operate at the rated output of 4000MWt to produce an electric power output of around 1450MWe. The balance of plant (BOP) for the secondary system consists of main steam, feedwater, condensate, turbine generator and auxiliary system. In this paper, we describe the major design features of secondary component, balance of plant configuration, and then the turbine cycle thermal performance evaluation using PEPSE code.

• 시스템엔지니어링학술지
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• 제3권2호
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• pp.17-24
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• 2007

The HEMU-400X(High-speed Electric Multiple Unit 400km/h eXperiment) project starts in 2007. It is required to control and balance the systems engineering activities throughout the project life cycle for a successful completion of the project. The Systems Engineering Management Plan(SEMP) is the primary, top level technical management document for the integration of all engineering activities within the context of, and as an expansion of, the project plan. A SEMP should be prepared for each project and regularly updated as development progresses. This paper proposes the systems engineering management plan for the HEMU-400X project.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.683-684
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• 2015

Project Financing (PF) is the long-term financing of infrastructure and industrial projects based upon the projected cash flows of the project rather than the balance sheets of its sponsors. However, the financial institution, the subject of financing in the case of PF in Korea, the lack of validation system of business, rather than to assess the feasibility of the project, requested a credit reinforcement to the construction company, the fact is Construction Company on loans of the employer is the guarantor or debt argument commitments accordingly. As a result, PF contingent liabilities, which are indirect debt, are triggered in the construction company, not included in the financial statements, along with the disclosure standards established according to 2009 PF contingent liabilities, and major can be a management item. In this study, PF contingent liabilities is of Pearson of the index and the PF debt ratio showing the main financial ratios and risk by classifying the credit rating and contractors Ranking of construction companies in order to analyze the impact on the financial condition of the company was performed correlation analyzes, through the Pearson correlation coefficient analysis indicated quantitative or negative relationship to derive the explicit indication.

• 산업경영시스템학회지
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• 제39권1호
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• pp.17-24
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• 2016

Many organizations have transformed their business in order to survive and compete in the future. They generate projects by creating a vision, using strategies and objectives with funds aligning strategies and make efforts to complete them successfully because project success leads to business success. All projects have triple constraints such as scope, time, and cost to be completed. Project cost performance is a key factor to achieve project goals and which is mostly related with risks among various cost drivers. Projects require a cost estimation method to complete them within their budget and on time. An accurate budget cannot be estimated due to the uncertainties and risks. Thus some additional money should be funded in addition to the base budget as a contingency reserve for identified risks and a management reserve for unidentified risks. While research on contingency reserve for identified risks included in project budget baseline have been presented, research on management reserve for unidentified risks included in total project budget is still scarce. The lack of research on estimation method and role of the management reserve have made project managers little confidence to estimate project budget accurately with reasonable basis. This study proposes a practical model to estimate budgets including contingency and management reserves for not only project cost management but also to keep the balance of organization's total funds to maximize return on investments for project portfolio management. The advantages of the proposed model are demonstrated by its application to construction projects in Korea and the processes to apply this model for verification are also provided.

• 한국농촌건축학회논문집
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• 제9권3호
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• pp.63-72
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• 2007

Recently, with the policy balance development in the country, Ministries of the government as managers related each of regional projects have prepared pan-governmental support system to achieve Making Livable Area Policy. This study is analysis result of investigation in 2007 authorized cases of MLCP(Making Livable City Project) which Ministry of Construction & Transportation have propelling from city and rural-urban area of town, myeon and dong, to rural area of small village size. Areas chosen for MLCP have the active participation of inhabitants, and to promote successfully project, need to support system and originality for area. Such projects will finally increase the life quality, and make life-spaces wanting to live in the area.

• Journal of Construction Engineering and Project Management
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• 제5권1호
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• pp.40-46
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• 2015

This study presents the results of our analysis and recommendations for process and productivity improvements. The project studied consists of a 5-story research building, with a structure of steel frames supporting concrete slabs. The observations focused on the analysis of the overall erection and framing process. The methods used for the analysis consisted in intensive visits on site, where construction processes were observed in term of resources, activities, durations, materials' handling procedures, and technology used. Back to the office, authors used the information captured to model the different trades' activities, using work sampling and 5-minute rating technique. The work sampling provides insight into the activity, hence allowing for process improvements. The productivity of various trades is strongly dependent on the organization of the work process and work site conditions. Improving the productivity of the entire project or company is not possible until everyone is committed to improvement.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2010년도 춘계학술대회 초록집
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• pp.128.2-128.2
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• 2010

For stationary 1kW-class fuel cell systems to be used widely, it is essential to achieve dramatic improvements in system durability as well as cost reduction. In order to address this engineering challenge, it is important to develop innovative technologies associated with BOP components. According to this background, in 2009, the Korean Government and "Korea Institute of Energy Technology Evaluation and Planning(KETEP)" launched into the strategic development project of BOP technology for practical applications and commercializations of stationary fuel cell systems, named "Technology Development on Cost Reduction of BOP Components for 1kW Stationary Fuel Cell Systems to Promote Green-Home Dissemination Project". The objectives of this project are to develop fundamental technologies to meet these requirements, and to improve the performance and functionality of BOP components with reasonable price. The project consortium consists of Korea's leading fuel cell system manufacturers, BOP component manufacturers which technologically specialized, and several research institutions. This paper is to provide a summary of the project, as well as the achievements made through the 1st period of the project(2009~2010). Several prototypes of BOPs - Cathode air blowers, burner air blowers, preferential oxidation air blowers, fuel blowers, cooling water pumps, reformer water pumps, heat recovery pumps, mass flow meters, valves and power conditioning systems - had been developed through this project in 2010. As results of this project, it is expected that a technological breakthrough of these BOP components will result in a substantial system cost reduction.

• 부동산연구
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• 제28권1호
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• pp.23-37
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• 2018

유전 알고리즘(Genetic Algorithm) 과 분단탐색법(Branch & Bound Method)은 문재인 정부의 핵심적인 부동산 정책인 도시재생 뉴딜사업에서 대상지역을 선정할 때 제한된 예산범위 내에서 사업의 효과가 큰 사업지구들을 지역균형을 고려하여 합리적으로 선정하는 유용한 방법론이다. 2017년 도시재생 뉴딜 시범사업에서는 각 광역지자체가 최대 3곳의 사업지구를 신청할 수 있고, 국토교통부는 이 중에서 중심시가지형 13곳, 경제기반형 2곳을 선정하며, 공공기관제안형 도시재생사업을 별도로 광역지자체에서 신청받아 10곳을 선정할 계획이다. 그런데 사업의 효과만을 기준으로 사업지구를 선정하면 지역균형발전에 부정적인 영향(1곳도 선정되지 않는 지자체 발생)을 미칠 수 있으므로 이에 대한 고려가 필요하다. 그러므로 본 연구에서는 최적화 모형을 구성하기 위해 유전 알고리즘 및 분단탐색법을 응용하여 지역균형발전 조건을 만족하면서 사업효과를 극대화하는 최적 사업지구조합을 도출한다. 이러한 방법론은 경우의 수가 대단히 많아 직관적으로 해결하기 불가능한 조합 최적화의 문제를 해결하는데 매우 적합하며, 부동산학뿐만 아니라 다양한 분야에 응용할 수 있는 방법론임을 2017년 도시재생 뉴딜 시범사업 선정사례를 통해 알 수 있었다. 향후 중앙정부가 특정목적의 제한된 예산을 각 지자체들에 배분하는 사례에서 이 방법론을 적용한 결과가 합리적인 기준이 될 것으로 기대한다.