Start with a decision, not decoration
A useful fact sheet brief names the reader, the decision or action the page should support, and the evidence required before design begins. For this project the audience is readers who need a concise, authoritative summary of one subject. The working objective is to turn verified information into a quickly scannable reference. Write those two statements at the top of the brief and test every proposed section against them. Material that does not help the reader understand, trust or act should be removed, shortened or placed in a secondary channel.