Currently, the most commonly used pricing model in the bidding process for construction projects in China is based on the bill of quantities.
Traditionally, cost personnel had to manually compile the bill of quantities when preparing bidding documents. As construction projects grow in scale and complexity, this manual process often leads to errors such as omissions or duplications, causing the base price to inaccurately reflect the true engineering cost. Furthermore, construction units usually allow only a short time for bidders to prepare their documents, aiming to start construction promptly and comply with regulations. Under these time constraints, relying on manual quantity calculations makes it challenging to verify the bill of quantities accurately and to develop reasonable bidding strategies.
Integrating BIM technology into the bidding process improves efficiency, accuracy, fairness, and transparency. Using the BIM model provided by the design team, owners or their appointed bidding agencies can quickly extract project quantity information. This allows for the preparation of a precise bill of quantities tailored to the project’s specific characteristics, minimizing the risk of omissions or calculation errors. A more accurate bill of quantities leads to a more reasonable base price, which supports a smoother bidding process.
When the bidding documents are distributed, the bidding unit includes the BIM model alongside the bill of quantities, ensuring the integrity of design information throughout transmission. This reduces the workload for bidders, who can rapidly obtain quantity data from the model and cross-check it with the bidding document requirements. As a result, they can develop effective and competitive bidding plans more efficiently.
Moreover, leveraging BIM technology over the Internet facilitates the participation of international construction companies in project bidding, enhancing competitiveness and improving project quality. It also enables real-time, dynamic supervision of bidding and tendering by management authorities, promoting fairness, impartiality, and transparency throughout the bidding process.
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