I think that it would be very effiecent for companies that had the full autodesk package i.e (Vault and Inventor) for the Inventor to have its own part numbering system built in and allowed the user to set parameters it wants in the name, plus to reduce the number of duplicate parts in the "Dimensions" parameter in the part, the overall dimensions should be called up so that when you want to make a part you can seach for the dimensions to see if its already been drawn up.