Re: Do memos have to be under version control?
A doctor's memo to file pertains to a single event. Probably many other types of businesses have a similar requirement.
Our manufacturing, on the other hand, tends to be a stream of batches. Our legal and regulatory stances sometimes change because we learn something about how the product behaves or is used. Or, there might be a running design change or materials change, with regulatory or legal implications. Or whatever.
To address those kinds of changes, we need to track when (date and batch number) our stance was X, and when it changed to Y.
Thus, versioning of our regulatory files, including memos to file.