The copies of the drawings in your production department are controlled. You have no problem there, assuming all copies are updated as necessary. Your problem would be where one stack is updated with a revision change, but someone missed the other. I think your issue is with document that aren't updated when revisions change. If your production people don't have the latest welding inspection criteria, what good is it. If they are temporary, print and use documents you're fine. If they are more permanent nature, you need to figure out a way to ensure they are updated with changes. Think of it this way. Uncontrolled documents are temporary in nature. They are good the moment you print them off. However, as time passes they may get stale as updates and revisions are made. At some point, they will actually be no good to use any longer. The "uncontrolled" stamp is used to save us the time of trying to find and recall all of the old copies which may be floating around. If you make a habit of using those docs on a per use basis, and then dispose of them, life becomes much easier. Good luck.