Answer:
Request for proposal (RFP)
Step-by-step explanation:
Request for proposal is a document released by a business that seeks proposals from suppliers. Usually suppliers are selected through a bid process.
Suppliers are required to procure a commodity, service, or an asset.
RFP is submitted early in the project cycle as it is important on getting a lot of materials for the project.
RFP is usually used when there is need for specialised skill or when the commodity is difficult to obtain