This article is a great mindmap and rough roadmap for people which do not know what they should ask for, if they have to make a "Product Development System" decision.
Paul used very important key points in his article:
As-Is Business Process Analysis
request that the analysts give you the full picture, not just the case for their ROI
Additional to this great information:
I believe it is also important to talk about the SCALABILITY. Scalability is one of the most important points we need to discuss during the "Decision making Process". This brings us to the very important point Paul mentioned: Your COMPANY VISION. If you have a system which is not sclable (CAD scalability with integral not integrated (addOn) applications; PDM System (Product Data Management) which does understand the complete set of references; Collaboration System (=creating virtual teams for the product development) which can work together with the CAD environment and understands the intelligence of the PDM System; Communication Solution which fits in your Product Development Process - cause it understands the complete set of information coming from the CAD and/or PDM and/or Collaboration System .....)
Behind that all is "ProductFirst" - YOUR PRODUCT IS YOUR SUCCESS.