When completing the bid in Bid Express, most data must be entered in the provided text boxes. In this article, we will delve into what bid proposals are, how they work and some best practices for proposing bids in the construction industry.All proposals, plans, Project Bids (EBSX) files and addenda are also available on the Office of Contracts web site. This RFP provides details on what is required to submit a. Proposal for the Work, how the State will evaluate the Proposals, and what will be required of the. All proposals, plans, Expedite (EBS) files and addenda are also available on the Office of Contracts web site.