This is a post by Emma Rudeck on the Concurrent Engineering Site.
With Creo Parametric, designers are able to build assemblies using mechanical connections. This enables them to investigate the motion behaviour of their designs in real-life conditions.
Using mechanisms design, designers are able to detect collisions between moving parts and quickly understand the kinematic implications of design changes.
For example, if you wanted to explore a gear box design, you could use this technology to enable clear analysis. Starting with an assembly created using mechanical connections, you can then capture snapshots of the gear box in different positions. Since the assembly is a fully detailed mechanism, not a static assembly, you can change the position by simply dragging the gear stick. As a result, you are able to run a dynamic interference check on the assembly.