• Korean Journal of Construction Engineering and Management
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• v.8 no.2
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• pp.173-181
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• 2007

The purpose of this study is to estimate elemental costs of an apartment building. The adapted research method includes a case study from $^{\circ}{\AE}H^{\circ}{\phi}$ construction company. The results of this study are as follows: 1) An elemental cost format of an apartment building is proposed, 2) An elemental cost table based on a case study of $^{\circ}{\AE}H^{\circ}{\phi}$ construction company is suggested.

• Korean Journal of Construction Engineering and Management
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• v.11 no.1
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• pp.142-150
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• 2010

The purpose of this study is to analyze maintenance costs and estimation of elemental costs for educational buildings. The adapted research method selected four school buildings in seoul region as BTL projects. On the basis of the selected case, the study suggested a model to establish a system for each parts and estimate analyzed construction costs and maintenance costs according to that system. According to the analysis, the study proposed a partial construction costs analysis table and maintenance costs table and analyzed proper construction costs and maintenances costs. The results of this study are as follows 1) The average ratio followed by calculation of partial construction costs of the four school buildings are as followings. The total construction costs is analysed 6,666million won and each part of average rations is structure 47.15%, exterior of building 8.34%, interior of building 23.37%, electricity & fire fighting facility 5.74%, water supply & healthy facility 4.27%, heating & water supply facility 5.25%, landscape 1.36%, civil engineering works 4.51%. 2)The average ratio followed by analysis of partial maintenance costs of the four school buildings are as followings. The total maintenance costs is analysed 4,309 million won and each part of average ratio is exterior of building 11.02%, interior of building 41.81%, electricity & fire fighting facility 14.81%, water supply & healthy facility 11.22%, heating & water supply facility 12.76%, landscape 5.75%, civil engineering works 2.63%.

• Korean Journal of Construction Engineering and Management
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• v.15 no.2
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• pp.23-32
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• 2014

Modernized Korean housing (Hanok) with competitive price has been actively developed due to the increased interests in traditional Korean housing. Developing new building materials and methods is an essential area for Modernized Hanok. This paper compared and analyzed two mock-up buildings of Modernized Hanok and one mock-up of Traditional Hanok those were actually constructed as test-beds. Many different new methods were introduced, and their influences on construction cost and schedule were analyzed in order to verify the research results as well as to find implications for future direction. As a result, the construction cost and schedule of Modernized Hanok have been decreased by about 40% and 20%, respectively, when compared with traditional one. 'Wood frame' and 'Roof' are found as being the most influencing areas with highest weights in terms of cost and schedule. Therefore, further development in these two areas would facilitate to reduce overall cost of Modernized Hanok with improved building performance.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1430-1432
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• 2011

공사비정보와 일정정보는 사업을 관리하는데 있어 매우 중요한 정보로 이들이 연계활용되어야 공정공사비 관리를 원활하게 진행할 수 있다. 그러나 국내의 실정은 공사비가 내역체계 기반으로 관리됨에 따라 설계사에서 작성되어 시설, 부위, 공간 등의 정보를 갖고 있던 수량정보가 내역체계 기반으로 전환되면서 정보들을 상실하고 시공사에서는 다시 물량분개라는 작업을 통해 다시 시설, 부위, 공간 등의 정보를 부여하는 작업이 발생하고 있다. 이에 도로분야 사업을 대상으로 작업분류체계(WBS)를 그 연계방안으로 제시하고 작업분류체계 기반 공사비 작성을 통해 설계사에서 작성된 정보를 시공사에서까지 활용할 수 있도록 하고자 한다. 본 사업에서는 이러한 작업분류체계 공사비 작성을 위한 지원도구 개발을 위해 업무 프로세스 검토, 지원도구 활용 공사비 작성, 시험적용을 통한 지원도구 검증을 수행할 계획이다. 이를 통해 내역정보와 공정정보의 연계가 실현되고, 효율적인 공사비 관리의 기반을 제공할 수 있다.

• Journal of the Korea Institute of Building Construction
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• v.11 no.1
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• pp.9-17
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• 2011

Project delay is one of the most crucial impact factors in the construction process from a schedule and cost management perspective. This study focused on analyzing the causes of concrete frame work delay in the apartment construction project. According to the analysis of project cost composition, the direct cost of concrete works was highest in most samples. Actual delays of concrete works were analyzed for the six different construction components. Causes of delay were grouped into two categories; preconstruction and construction phases and these two groups were further divided into sub-groups. Analysis results revealed that the most significant delay was occurred in the 1st. floor concrete skeleton work. For each delay factor, implications of delay as well as suggestion(s) for reducing the possibility of schedule delay are provided.

• Korean Journal of Construction Engineering and Management
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• v.8 no.4
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• pp.110-118
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• 2007

For deciding the owner's budget of the building construction in the predesign stage, the probabilistic methodologies for estimating the cost are often studied, however these parameter-based conceptual estimating methodology has limitation of applying it to the practical business because it hardly can link the design decision-making and the cost estimating and control. Besides if the result of detail estimating after detail design is over the budget, locally and arbitrarily control the level of interior design and fix the design. This research proposed the prototype-based cost estimating model for building interior construction which leads to estimate the interior cost easily linking with design decision-making and supports to evaluate the design alternatives in the schematic design and the design development stage for office buildings. The model divides the building on the design process by Element Breakdown Structure and presents the design alternative by selecting the elements of each room from the database accumulated the historical office buildings' prototypes and estimates the cost. The 2 case studies presented to validate the effectiveness of as the linking tool integrating the design and construction data and applicability to the practical design on the presented prototype-based model.

• Korean Journal of Construction Engineering and Management
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• v.8 no.6
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• pp.178-187
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• 2007

As the government has enforced recently the policies on the distribution of the housing, the construction cost of multi-family housing projects has increasingly become very sensitive and political issue. However, it is difficult to predict the construction cost in planning and design phase of the project because the Bill of Quantity of the multi-family housing projects was composed of breakdown structure based on each work package. To predict the construction cost in planning and design phase for multi-family housing projects in more effective and reasonable way, this study developed the cost breakdown structure based on spaces using Delphi method. The Cost Breakdown Structure (CBS) based on spaces for multi-family housing projects basically consists of three parts: (i) Building part; (ii) Non-building part; and (iii) Additional part. The characteristics of spaces in multi-family housing projects are fully taken into consideration. Then these three parts were subdivided into work packages in terms of work tasks. Additionally, the usefulness and effectiveness of Space CBS in this paper were validated by analyzing the BOQs of several collected sample projects and matching with Space CBS afterwards.

• Korean Journal of Construction Engineering and Management
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• v.4 no.4 s.16
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• pp.192-200
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• 2003

The object of this research is to develop a computerized algorithm of cost estimation method to forecast the total construction cost in the bidding stage by the historical and elemental work cost data. Traditional cost models to prepare Bill of Quantities in the korea construction industry since 1970 are not helpful to forecast the project total cost in the bidding stage because the BOQ is always constant data according to the design factors of a particular project. On the contrary, statistical models can provide cost quicker and more reliable than traditional ones if the collected cost data are sufficient enough to analyze the trends of the variables. The estimation system considers non-deterministic methods which referred to as the 'Monte Carlo simulation. The method interprets cost data to generate a probabilistic distribution for total costs from the deficient elemental experience cost distribution.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.11a
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• pp.232-233
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• 2021

As construction projects become larger and more complex in the construction environment, and as the Building Information Model(BIM) is technically introduced, the demand for construction costs in units of space is increasing. Cost estimating of spacial element can reduce the error in cost prediction method based on cost of work type and to utilize the construction cost data for each space in the design phase. The purpose of this study is to extract spatial statements by utilizing spacial information of quantitative statements based on items that are common elements of the Quantity Take-Off and Bill of Quantity.

• Korean Journal of Construction Engineering and Management
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• v.5 no.1 s.17
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• pp.53-61
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• 2004

As remodeling project is progressed in the constraint which is utilization of existing resource, the subject of remodeling and extend of construction are affected by the correlation between building element. Therefore, this research analyze the correlation between component of building element in the design phase and proposed the diagram model for correlation between building element and proposed selection method of alternative plan for optimized combination of building element in remodeling project.