We're getting ready to purchase a PDM software for our engineering department. We have 5 seats of Solidworks, 2 designers, 2 engineers and 1 lead engineer. We also have AutoCAD drawings, so being able to manage both is a must. We are not a "Job Shop," and we have approximately 7000 files, majority of those are AutoCAD. We don't plan on converting directly to SolidWorks, but we are gradually modeling parts in 3D. We are getting ready to purchase a new ERP system, and that is suppose to handle all of our ECO/ECN's. So managing revision level is a must. We currently keep all old revisions on paper file for 7 years because if we have to replace/repair something due to a warranty problem we need to know what the old design was. Is there a system that will tell you what drawings need to be changed if a model is changed? Please post your experience, no resellers or representatives of companies. Thanks -Matt