01
Write one proposition and identify its audience
Begin with a sentence describing the intended output and who it is for. For example, the group proposes a short illustrated booklet introducing the garden’s development to visitors. Keep that proposition separate from ambitions such as increasing participation, which would require their own basis and review. Name the proposed format and the boundaries of the subject. If the group has not decided whether the booklet is printed or digital, record that as an open choice. A clear proposition gives collaborators a common object to discuss without hiding unresolved details.
02
List what supports the idea and what is assumed
Record the material the group knows is available, distinguishing confirmed items from material it hopes to obtain. A proposed interview is not a completed source, and an unexamined photograph is not a verified account of an event. Add an assumptions column for beliefs about audience interest, permissions or the amount of usable material. The worksheet can use rows for proposition, support, assumption and question. This structure keeps the project’s rationale readable while making it clear which parts depend on further work rather than presenting a persuasive paragraph as a substitute for that work.
03
Define the next review and the boundary of the brief
State what the group needs to learn before expanding the project, such as whether enough usable material exists for the intended format. Identify who will check each open question and where the answer will be recorded. Keep the next review focused on the premise rather than treating it as approval of every later design choice. Date the brief and preserve earlier versions when its foundation changes. The resulting page gives collaborators a proposition, an audience, supporting material and an explicit path for resolving questions, while leaving the eventual project outcome undecided.