This is a post by Mike Gayette on PTC site.
Early simulation is the key to making changes while still in the design and prototyping phases, so you can avoid spending budget on failed prototypes or excessive error chasing later in development.
Creo Simulate works for most applications, but not all. If what you want is state-of-the-art, nonlinear stress testing while keeping the familiar Simulate interface, then the Creo Advanced Simulation Extension is for you.
Here are five reasons why.