The Risks of Reusing Engineer’s Models in the BIM Coordination Process

Why Reusing Engineer’s Models is Risky

Engineer’s models are typically created as conceptual designs, focusing on high-level layouts and meeting engineering standards. However, these models often lack the level of detail, accuracy, and constructability required for BIM coordination and shop drawing production. Engineers are not tasked with ensuring their models align with real-world installation standards, which leaves room for inaccuracies, inefficiencies, and unresolved conflicts.

Placing too much trust in these conceptual models can lead to costly rework, schedule delays, and on-site issues. If a trade partner proposes reusing an engineer’s model as the basis for the BIM coordination process, it’s a red flag that their BIM team may not have the expertise to create models tailored for constructability and field use.

The Value of Starting from Scratch

High-quality BIM service providers avoid reusing engineer’s models and instead create their own models using project-specific submittal data, proprietary templates, and fabrication-level content. By starting from scratch, BIM teams gain a deeper understanding of the project, allowing them to identify and resolve inefficiencies in the engineer’s layout. This proactive approach ensures that every pipe, duct, and conduit fits seamlessly within the building’s design and adheres to installation standards.

Moreover, modeling from scratch provides the flexibility to adapt layouts for optimized performance. Experienced BIM professionals bring a level of detail and precision that is difficult to achieve by simply repurposing an engineer’s conceptual design.

When Reusing an Engineer’s Model Can Work

While reusing engineer’s models is generally discouraged, there are exceptions. If the model comes from a trustworthy engineer known for excellent layout practices, and the trade partner has the capability to convert it into fabrication-level content, reuse might be viable. However, this requires a robust quality control (QC) process to ensure the converted model meets shop standards and is free of errors.

This method is most effective with in-house BIM teams that have developed reliable workflows to validate the accuracy and constructability of reused models. Even in these cases, thorough QC checks are critical to avoid costly mistakes.

Proceed with Caution

If a trade partner insists on reusing an engineer’s model, take the time to meet with their BIM team to review their processes. Ask questions about how they plan to execute modeling, coordination, and shop drawings, and ensure they have a rigorous QC process in place. Be wary of providers that lack these safeguards, as they are unlikely to deliver the level of quality and detail your project demands.

Conclusion

BIM coordination is not just about meeting deadlines—it’s about delivering a building that works in the real world. Relying on an engineer’s model shortcuts the process and introduces unnecessary risks. By choosing BIM teams that create their own models from the ground up, you ensure accuracy, efficiency, and a seamless construction process. In the rare instances where reuse is appropriate, a stringent QC process is non-negotiable. Prioritize quality and expertise, and your projects will benefit from fewer surprises and smoother execution.