Model-Based Definition > Model-Based Definition > Creating Various Annotation Types > Dimension Properties > Driven Dimensions > About Driven Dimensions
About Driven Dimensions
Driven dimensions are used by Creo Parametric to measure the size and shape of features within a model. The value of a driven dimension changes when the size and shape of the features are modified. Driven dimensions can have tolerances, to which manufactured components can be accepted or rejected.
Manipulation of the tolerances for a driven dimension is similar to that of the tolerances of regular dimensions. You can change the tolerance values and modify their format. A difference is that the driven dimension cannot be set to an upper or lower bound because the nominal value of the driven dimension is not changeable. Its value is derived from the measurement between the two reference entities.
Driven dimensions can be included in Annotation features.