The most challenging task for engineers is to guarantee that the dynamic performance of their mechanical systems will match specifications. They need to make sure that the numerous components interact and move as planned under the influence of real-life conditions, such as gravity and frictional forces. Virtual prototyping has to deliver the right answers, with the required accuracy, and on time to positively impact the development process. The best solutions are those that can be easily re-scaled to support the various stages of the entire development process. Equally important is that these solutions assess the dynamic motion performance in light of all system requirements, including durability, noise and vibration.