Dave Martin in the blog “A Quick Guide to Semantic References in Creo MBD” discusses about Semantic references for model-based definition (MBD) are CAD model surfaces that are included in the 3D annotations that explain how a part or assembly is to be manufactured and inspected.

Semantic references, such as those highlighted in green in the part shown above, can be read by computer-aided manufacturing (CAM) software for defining toolpaths and coordinate measuring machines (CMM) for performing inspection.

Incorporating MBD and semantic references can reduce the design-manufacturing-inspection cycle time by up to 74.8% according to a NIST study.

What is MBD?

Model-based definition is the practice of documenting and capturing a model’s product and manufacturing information (PMI) in the form of 3D annotations. These include details like

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