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Model-Based Definition (MBD) in 3D CAD Software

Deliver precise, standards-based manufacturing data, right from your 3D model (EVP)

What is MBD?

Model-Based Definition (MBD) is a process where the 3D CAD model includes key product and manufacturing information (PMI) such as dimensions, tolerances, materials, and annotations, alongside the geometry. By enriching the model with this data, your team can improve accuracy, reduce ambiguity, and streamline communication across design, manufacturing, and inspection.

While 2D drawings may still play a role in certain workflows, MBD helps shift more of the essential information into the model itself, supporting greater collaboration and automation.

Integrated 3D Annotations

Add geometric dimensions and tolerances (GD&T), weld symbols, and datums directly to your 3D models. Onshape’s standards-compliant annotation tools ensure your design intent is clearly communicated, without needing to rely solely on 2D drawings.


a 3d model of a metal pipe with measurements on a white background .

Smart Inspection Panel

The Inspection Panel presents a structured, filterable list of all Product Manufacturing Information (PMI) associated with your model. Instantly see dimensions, tolerances, and datums linked to specific geometry. Easily cross-highlight items in the list with their 3D counterparts for fast review and validation.

a screenshot of a model definitions page with a table of tolerances and lower limits .

Shareable MBD Views

Communicate manufacturing intent more effectively with shareable URLs –always the case in Onshape– that preserve model display settings, section views, and MBD annotations. Onshape acts as both the viewer and the production tool, so you never need to export or access an add-on. Just open the PMI-rich model directly in your browser.


a screenshot of a share settings for a document. Onshape

Feature Tree Awareness

MBD metadata is intelligently linked to your model’s feature tree. Whether added through sketch dimensions, hole tolerances, or tagged datums, all annotations remain tied to the right geometry, enabling a clear, contextual understanding of your design’s specifications.

a screenshot of a 3d model of a valve housing .

Downstream-Ready Data

Designed with real-world workflows in mind, Onshape MBD supports future export to STEP AP242 and seamless handoff to tools used for inspection and compliance, such as PC-DMIS or AS9102 documentation. It bridges the gap between design, quality, and manufacturing teams.

An export screen in Onshape

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For more FAQs related to Onshape Enterprise, visit our Enterprise FAQ page.

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