Thermal Measures
Creo Simulate uses one or more measures to determine convergence. Select Measures for convergence if you are interested either in results for one or more specific quantities, such as maximum flux magnitude, or in results at a particular location, such as a boundary condition or local flux concentration.
Using Measures can help improve accuracy for the quantities in which you are interested, and may also lower the computation time for your design study.
When you select Measures as the convergence option, the 
Measures button becomes available. Click this button to select thermal measures from the Measures dialog box. You can select any global or local thermal measures.
Measures button becomes available. Click this button to select thermal measures from the Measures dialog box. You can select any global or local thermal measures.For more information about measures in general, see About Simulation Measure.