Abstract
Building information modeling (BIM) provides facility managers with a large database consisting of 3D geometric data as well as management data. In particular, Industry Foundation Class (IFC) has been applied in many studies as it provides extensive and diverse information regarding building components. With the use of BIM combined with case-based reasoning (CBR), in this study, a model was developed to estimate replacement costs by retrieving cost information from IFC. This study focused on the replacement of windows for office buildings, and the costs associated with that replacement. Two main advantages were identified in the proposed approach. First, the replacement information required for the comparison of different cases is automatically obtained from a BIM file and parsed for predicting a cost estimate using IFC. Next, the accuracy is increased by matching various cost-related data such as contractors and manufacturers in the estimation of replacement costs with the help of CBR.
Highlights
The maintenance costs of building components could be as much as two or three times the cost of design and construction [1]
Building information modeling (BIM) technology was applied in this research with the intention of aiding building facility managers in decision-making processes and budget management by using a case-based reasoning (CBR) algorithm
Facility managers often rely on national averages or their own personal experience when estimating installation costs for building components; the integration of various data such as structured and graphical data in Industry Foundation Class (IFC) with the CBR model resulted in an accurate cost estimation based on the existing best matching cases
Summary
The maintenance costs of building components could be as much as two or three times the cost of design and construction [1]. For replacing a building component, a facility manager must investigate the details of the components to determine the costs associated with each component. This type of information will differ between facilities. As these properties can vary widely, it can be difficult to resolve issues such as determining the cost of replacing a window. The cost data of building components is stored separately in the form of spreadsheets, plans/drawings, and construction documents. As drawings and spreadsheets are stored independently, it is difficult to use/analyze them
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