Use of building information modelling to mitigate cost overruns in design and build projects

Abstract

Cost overrun in the design and build (D&B) procurement method is a significant obstacle in achieving the project goals. Therefore, it has become critical consideration over its numerous benefits when selecting this procurement method. However, applying new technologies, such as Building Information Modelling (BIM), can significantly minimise this issue. Thus, this study aims to investigate the use of BIM to manage the cost overrun issues in D&B projects. A qualitative approach based on two rounds of interviews was conducted to collect the data. The study findings revealed ten highly important causes of cost overrun in D&B projects. Continuous design and drawings changes due to incomplete initial drawings prepared with insufficient design data at tendering stage, errors or omissions revealed during construction, and inefficient planning and scheduling by the contractor were the top three causes. Further, BIM functions such as interoperability and exchange of information, clash detection, digitalised quantity take off, and cloud computing were identified as they can be used to manage highly important causes of cost overrun in D&B projects. This research assists professionals in identifying the most appropriate BIM functions to reduce the fear of price uncertainty when implementing the D&B procurement method in their projects. Further research on identifying the barriers and suitable strategies for implementing BIM in D&B projects to reduce cost overrun can be based on the present study.