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    Beyond BIM - Leveraging the Model for Estimating, Procurement, and Fabrication

    Sept. 14, 2022
    Using a constructible process in which data is shared and updated in real-time with all stakeholders optimizes the entire building design, build, and operational lifecycle.

    Over the past two decades, the adoption of building information modeling (BIM) has steadily grown and become a more common industry practice. Traditionally utilized in the design and modeling phases of a project, BIM has provided benefits such as improved coordination with other trades, better planning, and more accurate and efficient layout in the field.

    Now the industry is embarking on the next phase in the growth and adoption of BIM, a phase in which the model is utilized beyond just the design and layout of a building. However, for this new approach to be successful, all project data must be accessible, accurate and actionable by the right people at the right time. Oftentimes, MEP contractors are unable to share or access up-to-date data, leaving gaps in information and coordination that make it difficult to carry out MEP construction effectively.

    Using a constructible process in which data is shared and updated in real-time with all stakeholders optimizes the entire design, build, and operate lifecycle. Contractors can further extend the value of their models by connecting them during the estimating, procurement and fabrication processes for better project insight and visibility, improved collaboration, and more accurate project execution.

    Model-based Workflows

    The value of digital collaboration, in real-time and across teams, can be found in impactful workflows that ensure every person, phase and process works together seamlessly. It all starts with high-quality content—having the right information, at the right time, in the right format. And not just any content; content that is complete and up-to-date with attributes such as labor and pricing values, dimensions, parametric data, and more—because the last thing you want to do is make decisions using bad data. When powered by a common content source, the model can be leveraged by multiple people all working from the same data set.

    Understanding the role of shared managed content between the model and the estimating, procurement, and fabrication phases of a project can lead to improved collaboration and increased profits. Just-in-time project estimates, change orders, bill of materials, spool assembly instructions, project status, and more can easily be generated and accessed. All it takes is the click of a button to send that information to the necessary stakeholders and software.


    By connecting the model to the estimating software, the estimate can be continually updated with pricing and product information directly from manufacturers and suppliers as the project progresses. With this tool at their disposal, contractors can be sure that the items and prices they’re including in today’s job estimates and restrips are as up-to-date as possible.

    Using BIM models for estimating does not replace the 2D model, but rather, it ties the 3D model back to the estimate to help with execution and visibility. Although the initial bid price on a project is typically fixed, contractors can use model-based estimating to track their projects against the original bid estimate throughout the life of the project. 

    This visibility and insight helps contractors make adjustments while executing the project to ensure that the project comes in on time and on budget. Model-based estimating is also a valuable tool in communicating and quantifying project change orders. Over time, the ability to compare a model-based estimate against the original conceptual estimate helps estimators to improve future bid accuracy.

    David Derocher is the Portfolio Manager for Trimble MEP’s North American VDC Products. For more information, visit: mep.trimble.com.