RFX is a term used in procurement to refer to a request for information (RFI), request for proposal (RFP), or request for quotation (RFQ). These are types of procurement documents that are used to solicit information from suppliers or to request bids for a product or service. An RFI is typically used to gather general information about a supplier's capabilities, products, and services. An RFP is used to request detailed proposals from suppliers, including pricing, technical specifications, and delivery schedules. An RFQ is used to request price quotes for specific products or services.