When you set new dimension bounds, the system generates new model geometry from which you can obtain various engineering information, for example, tolerance stack-up, clearance and interference calculations, mass properties, assembly constraints, measurement, and reference dimensions.

Tolerance stack-up is the cumulative tolerance that occurs when Creo Parametric uses a series of dimensions with tolerances to dimension a certain feature in a part or an assembly member. To determine the tolerance stack-up for a particular model, you must first set dimensional bounds.

For a part, set dimension bounds for selected dimensions; for an assembly, set dimension bounds for selected assembly members. After you have regenerated the model according to the new dimension bound settings, you can use the Measure command from the Analysis menu to calculate the tolerance stack-up.