How do I submit a bid or proposal? All formal bids and proposals shall be submitted as specified in the solicitation document.The RFP process can be complicated to manage. Learn how to speed up your process with these steps and tips from proposal professionals. Accordance with the Arizona Procurement Code. FAQs on the topic of procurement and bidding for Arizona school districts. Learning about upcoming projects After becoming prequalified, contractors must learn about upcoming ADOT projects to decide which ones to bid. A request for proposal (RFP) is a business document that announces a project, describes it, and solicits bids from qualified contractors to complete it. The purpose of an invitation to bid is to provide standardized information to all bidders, fostering a truly competitive process. This tab discusses many of the steps you are likely to take while bidding as a subcontractor on ADOT projects.