Define the assignment
Write down who will read the brief, the decision they own and when they need it. Attach the existing specification so names and requirements stay traceable.
Turn requirements into pages
Use a short opening recommendation, a comparison of options and a page for responsibilities. Keep dates in a table so changing a deadline does not require redrawing the page.
Hand over the right version
Review the page order in the PDF before distributing it. Keep the editable project for revisions and distinguish estimates from commitments in the wording.
Example brief
How should a proposal handle missing numbers?
Give each unknown cost its own cell and identify who will supply it. Separate confirmed costs from assumptions so reviewers can see whether a missing estimate blocks approval.