The Guide to Writing Research Papers has a special section on writing outlines, and we recommend you review that material. From that document, here is one image (below) that might prove especially helpful, a sample outline (from the MLA Handbook ) of another proposed paper. The important thing to notice about it is how supporting details are arranged beneath more important ideas and the outline branches out (toward the right) as ideas become more supportive in nature. Logic demands that an "A" be followed by a "B." (If there is no "B," maybe there shouldn't be an "A," or "A" should be incorporated into the paper in some other way.)
A research proposal is another kind of a complicated academic writing you may be asked to complete pursuing a degree. It differs greatly from any other dissertation or thesis sample, as it is a practical proposal on some scientific investigation. It may even be of greater importance to your academia than any other paper you have submitted before. The tricky part in writing your research proposal paper is that it has to be 100% unique and original. No one will analyze a partially plagiarized research proposal, as it is supposed to promote a good start to your future career. Thus, you have to make sure you paper is grammatically flawless, well structured, and plagiarism free.