The process of designing an electro-mechanical device generally begins with generating a product design specification (PDS) document1. The PDS document describes the intended function of the device being designed, and the environment in which it will be used. It also specifies certain high-level requirements related to global constraints such as safety, shipping, and manufacturing. A properly written PDS document is solution neutral and does not specify design details; i.e., it describes what the product should do and not how it does it. This is crucial to ensure that the creative control of the designers is not stifled, and that changes to the design details will not necessarily require a change to the PDS. Furthermore, with regard to communication within large design teams, the PDS serves to ensure that every member of the team is working towards the same overall goals.