Request for Proposal (RFP), is the primary document that is sent to suppliers that invites them to submit a proposal for goods or services. An RFP could also be referred to as a sourcing project, a document, or an associated event (competitive bidding). The RFP is designed to obtain suppliers to provide a resolution to a business problem or issue. However, for more complex projects, an RFP may be the most effective way to source the goods or services.