"Bid" means an offer in response to solicitation. This tab discusses many of the steps you are likely to take while bidding as a subcontractor on ADOT projects.FAQs on the topic of procurement and bidding for Arizona school districts. Responsive bidder or offeror means a person who submits a bid which conforms in all material respects to the invitation for bids or request for proposals. A procurement officer may use on-line bidding to obtain bids electronically for the purchase of goods, services, construction and information services.