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Quantifying Combination Effects of Project Management Practices on Cost Performance
석성준,지석호,Stephen P. Mulva,Carlos H. Caldas,안성훈 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.3
This paper presents an analysis method that quantifies the relationship between project management practices and the cost performance of construction projects. The analysis method includes a series of analysis procedures and methods: data measurement and transformation, contingency table analysis, logistic regression, and a composite index. Step-by-step analysis procedures and methods are described along with the data obtained from 143 owner projects to examine the effect of nineteen project management practices on cost performance. The analysis method uncovers the minimum implementation levels of project management practices for better cost performance, and quantifies the combined effects of project management practices on cost performance varied by their implementation levels. The analysis results generate specific and quantitative information used in implementing project management practices for better cost performance. This information will help practitioners achieve improved cost performance in the most effective and efficient way. The analysis method designed with a series of statistical methods makes it possible to produce useful quantitative information for the implementation of project management practices.
공동주택 하자처리과정에 대한 거주자 입장의 만족도 분석
석성준 ( Sung Joon Suk ),유현경 ( Hyun Kyoung Yoo ),강경인 ( Kyung In Kang ) 한국건축시공학회 2004 한국건축시공학회 학술발표대회 논문집 Vol.4 No.2
The demand for apartments is decreasing as the condition of housing market in Korea has changed. Therefore, construction companies have to understand the needs of the customers to win over them. It is important for construction companies not only to supply customers with high quality apartments but also to provide them high service quality for a long range plan. One of the important service of the construction companies is after-service(A/S) that includes the defect management. The inhabitants` unsatisfactory defect management will worse the image of the company among the future customers. Also A/S is one of the best way for the company to create good impression to the customers, so the defect management carried out by construction firms has to satisfy the inhabitants. In this study, the degree of association between inhabitants satisfaction and the company`s image is proved and the factors of the inhabitants dissatisfaction in defect-management are presented. The major factor that causes dissatisfaction is the long service time of the defect management. Therefore, shortening the time of process taken to deal with the defects would allow construction outfits to satisfy their customers effectively and to be more competitive ones in the Korean apartment market.
안성훈,석성준,이민희,An, Sung-Hoon,Suk, Sung-Joon,Lee, Min-Hee 대한건축학회 2011 대한건축학회논문집 Vol.27 No.5
Cost budgeting is a fundamental component of cost management, establishing a baseline for building construction projects. However, previous studies suggest that the cost budgeting at most construction companies are not systematically conducted. The purpose of the present study is to reveal the key factors which influence cost budgeting and to weight these key factors related to building construction projects. A questionnaire survey for identifying the factors which influence cost budgeting was conducted with cost budgeting experts. The analytic hierarchy process was employed to weight the relative importance of the factors identified. The results showed that data is most important category and level of design documents is most important factor. However, gaps of importance between factors are small, so it is revealed that all of 35 factors are influencing the cost budgeting. Research for using these weights of key factors influencing the cost budgeting is needed to quantify the level of cost risk during cost budgeting process, which enables cost planners and management to use improving the reliability of cost budgeting for building construction projects.
초고층 주상복합 프리캐스트 콘크리트 구조물의경제성 분석에 관한 연구
김범기,강경인,석성준,이웅균,안성훈 한국건축시공학회 2005 한국건축시공학회지 Vol.5 No.1
The increase of high-rise residential-commercial buildings is required to cut down a term of works and the cost of construction. Reinforced concrete structures and steel framed reinforcement concrete that are commonly used have the difficulty in reducing them. Therefore, the purpose of this study is to propose a new precast concrete complex system and to analyze its economical feasibility. The economic analysis is performed through comparing the cost of a high-rise reinforced building that was already constructed with that of the new proposed precast concrete system, which is limited to structural frame work of typical floors. This study shows that the proposed precast concrete complex system is economical. Further research should be directed at including the influence of a term of works.
안성훈(An Sung-Hoon),석성준(Suk Sung-Joon),이민희(Lee Min-Hee) 대한건축학회 2011 大韓建築學會論文集 : 構造系 Vol.27 No.5
Cost budgeting is a fundamental component of cost management, establishing a baseline for building construction projects. However, previous studies suggest that the cost budgeting at most construction companies are not systematically conducted. The purpose of the present study is to reveal the key factors which influence cost budgeting and to weight these key factors related to building construction projects. A questionnaire survey for identifying the factors which influence cost budgeting was conducted with cost budgeting experts. The analytic hierarchy process was employed to weight the relative importance of the factors identified. The results showed that data is most important category and level of design documents is most important factor. However, gaps of importance between factors are small, so it is revealed that all of 35 factors are influencing the cost budgeting. Research for using these weights of key factors influencing the cost budgeting is needed to quantify the level of cost risk during cost budgeting process, which enables cost planners and management to use improving the reliability of cost budgeting for building construction projects.
일체형 삽입식 신속 연결구를 이용한 건축 배관 연결 공법의 시공성 및 경제성 분석
김태훈 ( Tae-hoon Kim ),김대원 ( Dae-won Kim ),석성준 ( Sung-joon Suk ),박철 ( Chul Park ),이준서 ( Jun-seo Lee ),강경인 ( Kyung-in Kang ) 한국건축시공학회 2006 한국건축시공학회 학술발표대회 논문집 Vol.6 No.1
The internal construction industry is not situation of cost reduction based on low wages anymore by the increase as insufficient supply of skilled workers. Recently remodeling construction that only need to change facilities as to stay the existing structures are on the increase. Now the method of piping facility used to remodeling construction needs skilled workers, large work space and a variety of tools. These complex construction process have a difficulty of high-quality and economical construction. In addition it have the high incidence of warranty and a problem of cost increase as a commitment of manpower by warranty repair. In order to solve these problems it is necessary for appropriate new technology to the internal construction environment. Piping fittings by Insert & Coupling Joint is a method that unskilled workers can be easily constructed though one touch set up and it is convenient to maintain for repair work of piping facility. This technology show the effect of 3 percentages labor cost reduction as compared with piping fittings by press joint on apartment 500 households. Therefore this technology is supposed that attain a cost reduction though the technical and economical construction and a client satisfaction though the high-quality construction on the present construction market.