I'm presuming that since this is TD you are saving to a shared drive somewhere ? Unless you have some other sort of file recovery system in place, version control and forcing people to use it is the only way you can effectively prevent this from happening.
Yes, the tableau workbook is saved on a shared server. So you know how if two people were trying to access the same Excel file, then the second individual would only be able to open as Read Only. Is there a way to setup this kind of access to a tableau workbook to avoid the issue I mentioned in my original post?
Not that I'm aware, no.