(1) The BIM-based automated quantity calculation method frees cost engineers from tedious manual work, allowing them to focus more on valuable tasks such as inquiries and risk assessments. This saved time enables them to prepare more accurate budgets.
(2) Compared to traditional methods, the BIM-based automated calculation is more precise. Quantity calculation forms the foundation of engineering budgets, but the process is complex and prone to human error, which can compromise subsequent estimates. BIM’s automated quantity calculation eliminates these human factors, providing more objective and reliable data.
(3) This automated method also speeds up quantity calculations, offering timely cost feedback to designers and facilitating early-stage cost control. Traditional methods often take too long and fail to provide immediate insights into how design changes impact costs. For example, in the Hillwood project, cost engineers using BIM measurement saved 92% of the time while maintaining errors below 1%.
(4) BIM better handles design changes. Traditional cost accounting requires cost engineers to manually review design changes to assess their cost impact—a slow and unreliable process. By integrating BIM with cost calculation software, costs are linked consistently with spatial data. The system automatically detects changes, visually displays the results, and promptly informs designers, helping them clearly understand how design modifications affect costs.
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