A proposal's audience is those supporting the proposed project. The details you provide in a proposal may change, depending on your audience. For instance, if you submit a Proposal to your company's management, you may not have to include project costs or other background information. On the other hand, if you produce a proposal for an organization outside your company, you may need to provide more details. These details might include a rationale for why they should fund your project, as well as the necessary materials and costs. Before writing a proposal, you should always research your audience's background. This way, you will have a better idea about what information to include in your proposal.