What are the advantages/disadvantages of the proposal?

Disadvantage:The other disadvantage of the RFP process is that the suppliers may abuse the absence of big competition and try to negotiate on their own terms. Request for proposal serves as a versatile tool for companies to inquire more information about certain products as well as attract new suppliers to cooperation.

Advantange: A project proposal helps you break down your fees from start to completion, address how you prefer to be paid, and include additional fees that you might charge (such as those for sudden revisions not covered by the previously agreed-upon amount in the contract).