If I was your interviewer, I'd be looking to see how and what your document accomplishes. I don't care about the topic, more about that you didn't use ten pages when three would have done the job.
But that's my style, others vary. I worked for a fellow who rarely approved my large font/easy read documents, but I noticed that he used small fonts and smushed everything together in tiny clumps with not much white space.
When I began submitting my documents so they resembled his, he began approving them with nary a glance. Such is the professional world ...
I try to keep my documents simple - they can always become more complex as they see revisions. If you start out bombastic and sprawling, it's difficult to take an axe to it later.
Your safe bet is clear, readable documentation that the first time reader can tell what it is that you want them to do. Providing appropriate references to other pertinent documentation is useful but can be overdone.
Good luck, YMMV, and don't hesitate to make a new document for a process that you never got to improve. They won't know, as long as you can tell a good tale.