Before you read anything else, the first thing that you need to understand is that proposals can be a huge waste of time for you and for your prospect. If they are not created the right way, and if the proper foundation hasn't been built, then you'll be spinning your wheels. Most proposals have a 25% win rate. If done right, your rate should jump to 60% _ 80%.
In the business world many companies ask more than one supplier to submit a proposal showing what they might charge for a particular product or service. If you are new to the supply side of this situation you may need to refer to a sample proposal template to make sure that the bid you plan to submit is in the correct format. In many cases if a proposal is not formatted properly the company who has requested the bid will not even bother to look at it.