Microspeak: The one-pager
At Microsoft, a one-pager is an overview document. It is usually prepared during the early stages of a project or feature in order to share what is known, what is not known, and what the current ideas are. It is not intended to be a deep dive.
Different teams use different document templates for their one-pager documents. It might contain an elevator pitch, which is a brief statement of the problem and the desired outcome. In the business world, an elevator pitch is a brief but compelling description of an idea, product, or company, so-named because it is a speech you can give to someone important during the course of an elevator ride. In a one-pager, it is a brief but compelling description of your project or feature.
The other parts of the one-pager may be devoted to things like customer research results, a list of alternative solutions, the goals and non-goals of the feature, the project’s success metrics, and any external dependencies that would prevent the project from succeeding.
What I find particularly amusing is that the one-pager almost never fits on a single page. In many cases, the blank template is itself already longer than a page!
Some time ago, I was called upon to be one of several presenters, each of whom had a ten-minute time slot to present their one-pagers. I was the only one who managed to fit my one-pager onto a single page. It turns out that writing concisely takes work, and limiting yourself to one page forces you to make hard decisions about what is most important.
Bonus chatter: I think part of the reason for sprawling one-pagers is that people feel that they have to write more about a subject in order to prove that they have thought hard about it. They treat the document as a “proof of work” rather than as a means of concise communication. Another temptation is to anticipate all possible questions and pre-emptively answer them in the document. It’s true that your one-pager should call out rejected alternatives, but you don’t have to write a paragraph-long justification for rejecting each one. If you feel the need to provide “proof of work”, move it to a supplement or appendix.