Creo Reverse Engineering (Restyle) > Managing Surfaces in Restyle > To Fit a Surface
  
To Fit a Surface
1. Click Restyle > Fit Surface to Points.
2. Select the surface to fit. Restyle fits the selected surface to the faceted geometry.
3. Optionally, to check the deviation of the fitted surface from the faceted geometry, click Restyle > Restyle Analysis and in the Restyle Diagnostic dialog box, select Deviation under Surface Diagnostic.