After determining the main problem that needs to be addressed, or the new product the team wants to create, team members should do more research on solutions/options already available to the public. They should discuss the shortcomings of those existing options and why their proposed product will be more effective. Then the costs (time and money) required, and potential revenue from succeeding should be weighed against one another. Finally, they can assign a few people from the team to draft the proposal, the rest edit it, before having the product manager approve it.