A Request for Proposal (RFP) is a prospectus inviting consultants to apply for work on a specific project.  An RFP outlines all the work and products required of a consultant and provides a means for evaluating the ability of various contractors to perform the required services. It is different from an open bidding process because an RFP is usually targeted to pre-selected potential contractors. CADA uses this RFP process to select vendors for services and/or consultants.

CADA uses a Request for Quotation (RFQ) for commodities, simple services or straightforward/uncomplicated parts with little or no room for product or service differentiation between responding vendors.