In engineering project contracting, bidding is the primary method used to select the most suitable party for executing a construction project. This process relies on free market competition and establishes a solid foundation for the project’s successful completion. Typically, bidders submit their quotations based on a provided bill of quantities, making the accuracy of this bill crucial. However, bidding timelines are often very tight. For instance, in large real estate projects, the general contractor may have only fourteen days to prepare bidding documents, despite regulations such as the Tendering and Bidding Law requiring at least twenty days for bidders to prepare their bids. This compressed timeframe often leads to inaccuracies in calculating project quantities, which can misrepresent the actual project scope. Significant discrepancies in quantity calculations may result in uneven or unbalanced bids from different contractors.
The bidding control price set by the tenderer acts as the maximum limit for bidders’ quotes, aiming to prevent bid rigging and collusion. Currently, most bidders rely on industry-related quotas to establish these control prices. However, due to inherent limitations in quota levels, control prices prepared in this way often fail to fully reflect current market dynamics. Additionally, the complexity of construction project pricing and the variability of market data significantly impact the accuracy of these control prices. Bidders must carefully review the bill of quantities against the tender documents within a limited timeframe and develop competitive pricing strategies based on their construction capabilities and market conditions. Unfortunately, time constraints often mean only selected project sub-items are reviewed, which can lead to inaccurate quantity estimates and potential project losses.
Applying BIM Technology in the Bidding Stage
1. Tenderers can leverage BIM models to rapidly prepare accurate bills of quantities and bidding control prices. BIM’s automatic quantity calculation features allow for faster and more precise quantity estimates. By comparing similar project data stored in BIM databases, the validity of the bill of quantities can be verified. Cost engineers can obtain up-to-date price information from BIM information databases, analyze unit price components based on local market conditions, and ensure the reliability of bidding control prices. Implementing BIM significantly enhances the accuracy of both quantity bills and control prices, thereby reducing risks for tenderers.
2. Bidders can utilize BIM models to review the bill of quantities efficiently, speeding up the quotation preparation process and addressing the challenge of limited analysis time. Furthermore, bidders can compare the bidding control price with current market prices, conduct thorough analyses, and identify the most competitive bids available in the market.
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