Abstract
A change in the traditional construction cost management system is necessary for systematic construction cost management through BIM, but it has yet to present practical improvements. In this study, we would like to present a framework for information structure for Building Information Modeling(BIM)-based construction cost management. In order to analyze the differences between the traditional construction cost management system and the BIM-based construction cost management system, the level of development (LOD) was used to analyze how much existing Bill of Quantity(BoQ) can be satisfied through the BIM model. To this end, the level of availability of information in the BIM model was analyzed for the traditional BoQ of the construction work. Based on LOD 300, the analysis of the level of satisfying the traditional BoQ by utilizing the information that can be extracted from the BIM model showed that the level of information in the BIM model based on the number of items was 35%, and the impossible information was 20.8%. As a result of analyzing the ratio of construction costs, 22.68% of the BIM model's information was still available, and 10.31% of the information was impossible. Items that cannot be calculated will need to be incorporated into other items or improved by means of calculation using schematics. In addition to this level of information, it is necessary to improve the structure of traditional BoQ documents so that they can be utilized in conjunction with the BIM model. It was intended to present the framework of the information structure for the management of construction costs. This framework is constructed by adding element and space information that can be linked to the BIM model to the traditional BoQ, which enables the integrated operation of the BIM-applied construction cost management system as well as the traditional construction cost management system.
Highlights
As BIM application business expands, interest in Quantity takeoff using BIM and construction cost management is increasing
In addition to this level of information, it is necessary to improve the structure of traditional BoQ documents so that they can be utilized in conjunction with the BIM model
It was intended to present the framework of the information structure for the management of construction costs. This framework is constructed by adding element and space information that can be linked to the BIM model to the traditional BoQ, which enables the integrated operation of the BIM-applied construction cost management system as well as the traditional construction cost management system
Summary
As BIM application business expands, interest in Quantity takeoff using BIM and construction cost management is increasing. Lee wanted to present a BIM-based cost estimation method that can be applied to the domestic construction environment by classifying the BIM-based cost estimation method into different types of work For this purpose, BIM m odelling was performed based on definitions of BIM data linkage process and BIM model data. Roh wanted to define the level of representation of the model in order to apply the BIM model to the construction stage due to lack of consistency To this end, the LOD level presented in domestic and international BIM guidelines was summarized, and the current status of BIM model expression level was analyzed through the survey, and the improvement plan was derived. As a result of their consideration of BIM-based construction cost estimates and prior research literature related to LODs and specifications, they all wanted to analyze the limited factors for introducing BIM into construction projects and suggest ways to improve them. We would like to analyze the adequacy of the detailed items of the BoQ and the current BoQ based on the existing detailed statement, analyze the differences between the BIM-based construction cost estimate and the traditional BoQ, and come up with ways to integrate and operate them
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