If we frame the fact that documentation is only part of process control (back in 1987 procedures did not have to be documented, that came later), and work instructions were only part of process control (when needed) I can't understand why document control became so important, other than some auditors had a thing for document control. No operator needs to know more about document control any more than any other aspect of how a process control. It's simply "gotcha auditing". Now THAT's absurd.