The process usually requires 90 days to complete (from publication of solicitation to final Supplier Contract or Purchase order). ➢ Requests for Proposals (RFP).Pima County open and closed solicitations are posted here. Find exclusive open government bids opportunities and RFPs. "Bidder" means a person who desires to make a proposal on procurement. (See "Qualified Bidder" and "Responsive Bidder"). 2. Proposers must identify a specific project type within the application and state a specific award amount being sought for the project. The process usually requires about 90-110 days to complete (from publication of solicitation to final Contract or Purchase order). Requests for Proposals (RFP).