This is an old outline I would give to my econ students to have them come up with their own product idea. I could not fine the direction page that goes with this it is just the outline which consists of these sections with have questions or things they are to include in that section (except for the group members name part they just write their names there) :
Group Members Names:
Fixed costs/Variable costs
This is just an outline, the students can write on it but then they will have to make a formal version of it.