This is super helpful ! Is there a format that you can create/share ? Like - is it like a spec (with "goal", "stakeholders", stuff like that). I'm betting it's not ...and that's makes this a little hard to get started on.
You guys had the benefit of looking at your peers' work - what would be a good two pager that we can learn from ?
It's less a spec and more of, choose the tool that fits the job. A lot of these documents fit the overall structure of "high-level situation & recommendation; industry / product / customer context; more depth on recommendations considered; FAQ"
I don't have any examples, anymore (I left Amazon some years ago), but here are a couple of links that have reasonable takes on the structure and guidelines:
Bottom line: the purpose of the document is to drive a high-quality decision, so include what will help, and leave out anything extraneous. (I know, that's not very actionable.)
You guys had the benefit of looking at your peers' work - what would be a good two pager that we can learn from ?