For most designers and engineers, the majority of their day is spent in the Pro/ENGINEER window hammering out models, putting together large assemblies, or attending to the painstaking details of a 2D drawing.  Others get the fortunate task of routing cables through an assembly or even creating a CNC path to mill out features on a part.  But one of the cooler and more fun things to do is actually run a Mechanica analysis on those parts and see what they will do in the real world.