Global sensitivity gives you a cross section of the design space—the values of measures as Creo Simulate varies one or more design variables through their range of values.

If the global sensitivity study were not available, you could obtain the same results by making several copies of a model and slightly modifying each one. After running a standard study on each, you could then plot the measure of interest from each run on a single graph. The global sensitivity study provides that data with one run.

In the most common type of global sensitivity study, you instruct Creo Simulate to vary a single design variable while keeping all other design variables constant. You can also do a study in which Creo Simulate varies multiple design variables simultaneously over specified ranges.

Another option is to offset one or more design variables while varying another. To do this, set start and end values that are very close together for the design variables you want to offset. You cannot set identical start and end values for any two design variables.

For an example of a global sensitivity curve plotting von Mises stress as a function of change in radius, see Varying a Single Variable in a Global Sensitivity Study.