• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2010년도 춘계 학술논문 발표대회 1부
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• pp.105-109
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• 2010

Nowadays, the construction of high-rise building is rapidly increasing. There are many cost-increasing factors to the management in the high-rise building construction. For large and complex projects like the high-rise building construction, the more systematic methods and tools are needed for cost control. It is important to identify major cost control items and to manage them for effective cost management in the high-rise building construction. This study proposes a method of identifying major cost-increasing factors in the high-rise building construction based on the Delphi method.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.507-510
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• 2006

도시가 복합화, 대형화되면서 도시의 수직적 확장에 대한 요구가 제기되었고 이에 따라 1930년대 이후 초고층 건물이 현저하게 증가하였다. 선진국인 미국에서는 뉴욕, 시카고를 중심으로 100층 이상의 초고층 건물이 건설되었고 1980년대부터 홍콩, 중국, 대만, 일본 등 아시아 지역에서도 초고층 빌딩이 건설되기 시작하였다. 국내에서도 초고층 건물에 대한 요구가 증가하면서 초고층 건물과 관련된 많은 연구들이 진행되고 있다. 그러나 초고층 건물에서 원가에 관한 연구는 다른 연구에 비해 많이 다뤄지지 않고 있다. 초고층 건축시공처럼 대규모 프로젝트일수록 원가를 관리하기 위한 체계적인 기술과 방법이 필요함에도 불구하고 이에 대한 연구가 미흡한 것이 아쉬운 점이다. 이에 본 연구에서는 초고층 건축시공에서의 원가관리를 합리적이고 체계적으로 수행하기 위한 방법의 하나로써 FMEA를 이용하여 원가증가에 영향을 미치는 여러 요인들을 평가하고 측정하는 방법을 제시하고자 한다. 이를 통해 초고층 건축시공에서 중점적으로 관리해야 할 원가증가에 영향을 미치는 요소를 도출하여 이들을 중점관리하기 위한 발판을 마련하고자 한다.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.354-360
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• 2009

The demands for large-scale construction projects such as Mega-projects are largely increasing due to the rapid growth of increasing populations as well as the need to replace existing buildings and infrastructure. Increasing costs of materials, supplies, and labors require the first cost estimates at the preliminary planning stage to be as accurate as possible. This paper presents the results obtained from the survey on evaluating nine critical success factors that influence the accurate first cost estimates for large-scale projects from practical experiences. It then examines the current cost structures of construction companies for large-scale projects, followed by the causes for cost and schedule overrun. Twenty completed surveys were collected and the Analytic Hierarchy Process was applied to analyze the data. The results indicate that technology issues, the contract type, and social and environmental impacts are the significant leading factors for accurate first cost estimates of large-scale construction projects.

• 한국건설관리학회논문집
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• 제13권2호
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• pp.147-155
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• 2012

최근 들어 많은 건설 프로젝트들이 대규모의 자본과 인력, 자원이 투입되고, 선진 건설사업관리 기법들이 도입되고 있지만, 사업비를 초과하는 사례가 빈번하게 발생하고 있다. 이는 여전히 사업비 관리가 제대로 이루어지고 있지 않고 있다는 것과 사업비 관리 업무에 내재된 많은 리스크들이 관리가 되지 않고 있다는 것이라고 설명할 수 있다. 따라서 사업비 초과를 방지하고, 프로젝트의 성공을 거두기 위해서는 사업비관리와 관련된 리스크 요인을 발굴하고, 분석하는 것이 매우 중요할 것이다. 이와 같은 관점에서 본 연구는 건설프로젝트 전 단계에 걸쳐 참여를 하고, 사업비 관리 업무를 수행하고 있는 건설사업관리자의 관점에서 시공 전(前)단계의 사업비관리 업무에 내재된 리스크 요인을 도출하고, 그 요인들이 사업비 초과에 얼마나 영향을 미치는지를 FMEA 기법을 통해서 분석하였다.

• Industrial Engineering and Management Systems
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• 제11권1호
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• pp.11-17
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• 2012

Along with the recent trend toward increasing variety and shorter life of products in the market, evaluation of risk for economic investment alternatives is of practical importance in manufacturing companies. This paper assumes that each alternative is composed of demand volume and unit sales price as income factors, and unit variable cost and fixed cost as expense factors. The paper assumes that these four factors move worse from the originally expected values, toward the direction of decreasing profit. Values of these four factors are also assumed to fluctuate from year to year over the entire multi-period. By applying the analysis of the breakeven points to each of the four factors, safer area against these changes is represented on the two dimensional domain called normalized total-cost unit-cost domain. A practical numerical example is analyzed to verify the validity of the proposed method.

• 한국IT서비스학회지
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• 제14권3호
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• pp.67-84
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• 2015

Software is more diverse and complex and the level of importance for the maintenance of application software to securely operate software is also gradually increasing in proportion. The calculation method for maintenance cost of application software applied in Korea public enterprises is involved in the range of 10 to 15% of development cost, depending on the Software Project Cost Estimation Guide. Moreover, as most software maintenance cost estimation procedures do not take into consideration of the risk factors related of maintenance, it can be seen as a main cause for the occurrence of maintenance related accidents. This study proposes a maintenance cost estimate model that takes into consideration of the risks related to the software maintenance activities to improve and resolve issues arising from the estimation of maintenance cost. In doing so, maintenance risk factors are analyzed and a risk index is derived through the analysis of risk levels based on the risk factors. Based on such analysis, a maintenance cost estimate method which reflects the maintenance risk index was established.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 2부
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• pp.97-98
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• 2011

The number of high-rise buildings has increased year after year, with there currently being 5 projects in progress to construct buildings higher than 100 stories in Seoul alone. The construction cost for such high-rise buildings is significantly higher than the cost for a conventional low-rise building, while maintenance costs are expected to be two to three times higher. To reduce the maintenance cost of a high-rise building, there is the need for a guide rail to be used for maintenance, which is why there is the need for research on the guide rail system. For this reason, as preliminary research to develop a guide rail, this study aims to derive the factors increasing construction cost by taking the installation of a guide rail into account. This is expected to lay the groundwork for the design and construction of guide rails for high-rise building maintenance.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.315-316
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• 2021

The proportion of maintenance work has been increasing due to the recent aging of the infrastructure, but the standardized construction cost estimation standards are insufficient for this. In particular, reinforced concrete structures are being applied to many structures such as buildings and bridges, and various construction methods for maintenance of reinforced concrete structures are being developed and applied. In this study, we surveyed about the current status of the construction method for the maintenance work of reinforced concrete structures and analyze the factors of the revision of the construction cost estimate standard for the reinforced concrete structure maintenance.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2019년도 춘계학술대회
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• pp.240-241
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• 2019

전 세계 물동량 둔화 및 항만 간 경쟁이 심화되는 가운데, 항만의 환경규제 강화 및 자동화 및 스마트화가 요구되면서 항만산업의 비용증가 요인들이 지속적으로 증가하고 있다. 따라서 본 연구에서는 항만산업의 주요 주체인 우리나라 컨테이너터미널 운영사의 비용자료를 직접 수집하였으며, 이를 통해 컨테이너터미널 운영사의 비용 구조적 특성을 분석하였다. 터미널 운영 규모별, 지역별, 부두 특성별 비용구조의 차이점을 살펴보고 그에 따른 시사점을 제시하였다.

• 품질경영학회지
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• 제18권1호
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• pp.77-83
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• 1990

A model for the economic design of an pn control charts with an assignale cause is presented and the loss-cost function for control schemes using these charts is derived. By minimizing this function with respect to the three control variables, namely, the sample size, the sampling interval and acceptance number, the economically optimal control plan can be optained. The article shows what influence increasing or decreasing condition, according to changeability of the size of these factors, of expected cost can have on the economy when an attribute control chart is used.