What do you require to write a business concept/ proposal?

Background information on the product/service/project, challenges/opportunities being addressed/met, industry specifics, market demands; clear goals, objectives and outcomes; necessary versus available resources (including funds) and stakeholders (including investors and service providers); and knowledge of the target market.

A clear , objective, and goal,.

You need to have a clear idea of what you want to do to address a  particular challenge.

you need to set clear objectives, how does the idea fit into your current focus. if you are not into advocacy, why do you want to venture into that? Identify strengths that will enable you to implement the proposed idea. What resources do you need to carryout the activity? Find out how much it is going to cost (budget)