Any kind of writing involves multiple drafts of the same document. I think technical writing can be especially challenging, because normally there are several documents in development at the same time, often there are multiple reviewers for each. Some organizations have streamlined collaboration so that one document comes back with all the suggestions.
In my experience, however, most companies' review process is something more than handwritten notes from 15 reviewers but something less than the ideal single draft containing all 15 reviewers' changes. Planning how to handle all those files before the numbers explode can make the project run more smoothly. That attention to organization can also provide a solid base for clients unsure about how to manage documentation once it is created.