⁷ http://www.sourcinginnovation.com/glossary/RFX.php.

RFX, which is one of the most common acronyms in the strategic sourcing and procurement landscape, is a catchall term that captures all references to request for information (RFI), request for proposal (RFP), request for quote (RFQ), and request for bid (RFB). The RFX process is probably one of the most difficult e-sourcing processes to define because it can range from a simple one-time RFQ to a complex multistage RFI/RFP/RFQ process, depending on the needs of the project. The complexity of the RFX process is determined by, among other factors, the completeness of the requirements, the number of suppliers that have been qualified, expected competition in the supplier base, inherent risk in the sourcing effort, and projected savings or cost avoidance opportunities.