In the current edition, there is an excellent article written by Art Hendrick. It’s a good insight in to how in fact, Simulation is indeed always perfect, but the material properties that clients provide/enter are not always accurate – and that is where the problems can start. Here is what Art says:
The simulation is perfect: Based on the data entered in to the computer and the mathematical data that the computer is using, the results will be accurate. COmputers don’t make mistakes.
The problem is insufficient data. Very simply, the computer is not perfectly replicating what might actually be happening in the die and press.