I provide drawings and such as part of being a consultant, and was asked today for the first time to provide models. I will comply of course, but I have a major concern. Is it possible to "write-protect" a model indefinately, you kknow like it's possible to protect Excel spreadsheets, Word documents, etc? My concern (and I have seen this happen) is that for whatever reason, a change is needed to be made to a design that I've done. The design owner decides, hey it's just a little modification, let's get our CAD guy to change it. Now it could be something like a change for manufacturing purposes, or anything else actually. The change is made, but I'm never notified for whatever reason. The part gets made and as a result of a minor change, a failure takes place. The next thing I know I'm named in a lawsuit. The rest of the story is painful, time consuming and costly.
This has not happened to me personally, but I know of people that it has happened to. Yes, I know that is why I have insurance, but it certainly would be nice to have a fairly solid line of defense against this occuring.
Is there an existing way to either prevent the modification, or place a some sort of date signature in the file somehow to provide a leg of defense against these issues? If not, I will write a VB thingy to do a some sort of signature in the drawing.