From BIM model quality to collaboration and project coordination using Trimble Connect. Discover 10 best practices for model-based infrastructure delivery.

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Summary

Transitioning from drawing-centric workflows to model-based delivery is a major shift. Based on lessons from the Eskilstuna interchange project, explore these 10 best practices for delivering infrastructure through a model-only tender.

Model-based delivery represents a significant shift for engineering and construction teams transitioning from drawing-centric workflows. The Eskilstuna interchange project, delivered through a model-only tender using Trimble Connect, provides several clear lessons for organisations considering a similar approach.

1. Establish the model as the primary project document

  • Define early that the 3D model will replace drawings as the contractual source of truth.

  • Ensure model content is complete, accurate, and unambiguous.

  • Embed all critical design information—geometry, attributes, specifications—directly within model objects.

  • Structure the model logically so users can navigate and locate information quickly

Why it matters: A model-first approach only works when the information normally dispersed across drawings is fully integrated into the model.

2. Invest in model quality from the start

  • Allocate additional time during early design stages to build a precise and detailed model.

  • Validate geometry, object relationships, and metadata before issuing the model for tender.

  • Maintain a clear naming and classification system for model elements.

Why it matters: Contractors must be able to reliably interpret information without referring to drawing sheets.

3. Use a shared digital environment for communication

  • Adopt a cloud-based common data environment, such as Trimble Connect, to host, view, and discuss the model.

  • Use shared views, screenshots, and object-linked comments to communicate queries and resolutions.

  • Ensure all project partners—designers, clients, contractors—operate within the same environment.

Why it matters: A shared model builds a shared understanding. It reduces misinterpretation and streamlines issue resolution.

4. Maintain consistency across organizations

  • Align on contractual expectations for a model-based tender.

  • Define responsibilities for modelling standards, updates, and information ownership.

  • Provide clear instructions on how the model governs over any supporting documentation.

Why it matters: When drawings are reduced or eliminated, clarity around roles becomes essential.

5. Support the workflow with clear processes

  • Develop workflows for model review, communication, and issue tracking directly within the digital environment.

  • Encourage teams to use model-based viewpoints rather than marking up separate documents.

  • Standardise how screenshots, links, and comments are shared to maintain traceability.

Why it matters: Effective model-based collaboration depends on consistent processes, not just technology.

6. Recognise where 2D documentation still adds value

  • Retain selected 2D outputs—such as profiles or linear geometry—where they genuinely improve interpretation.

  • Use drawings as supporting information rather than primary contractual documents.

  • Ensure any 2D views are derived directly from the model to maintain alignment.

Why it matters: Some engineering relationships remain clearer in 2D; hybrid support can strengthen understanding.

7. Use the model as a communication tool on-site

  • Encourage site teams to reference the model during coordination meetings, inspections, and issue resolution.

  • Share model links or viewpoints when clarifying questions remotely.

  • Where connectivity or hardware constraints exist, provide preloaded local versions or simplified model sections.

Why it matters: Model-based discussion improves clarity and reduces rework even when live updates are not used.

8. Foster a culture of shared learning

  • Acknowledge that many team members may be new to model-based delivery.

  • Encourage openness, experimentation, and feedback throughout the project.

  • Document lessons learned to support continuous improvement.

Why it matters: Cultural readiness is as important as technical capability when shifting to digital delivery.

9. Ensure compliance with standards and contractual frameworks

  • Validate that the model aligns with national standards, classification systems, and legal requirements.

  • Define how the model will be archived, referenced, and preserved as formal documentation.

  • Engage legal and procurement teams early to align contractual frameworks with model-based workflows.

Why it matters: A model-only tender must meet technical and legal thresholds to stand as a contract.

10. Plan for the long term

  • Treat each model-based project as part of a broader digital transformation journey.

  • Document successes, challenges, and enhancements for future projects.

  • Invest in training, modelling standards, and scalable workflows.

Why it matters: Model-based delivery becomes more efficient as organizations build experience and refine processes.

– Source: Trimble

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