The Department of Transportation has requested ideas for funding, designing, building, operating, and maintaining a high-speed rail system based on a procurement strategy. Eight different providers are qualified to undertake this enormous project. As part of this plan, interested parties provided bids that complied with the guidelines set forth in the paper. The Department of Transportation convened an evaluation committee to analyse all submitted ideas based on the proposals received, and as part of this evaluation and using the evaluation criteria, the committee selected the proposal that included the Department of Transportation's objectives. The project was finally given a contract by the Department of Transportation, and the company was hired to complete it. What kind of procurement plan or proposal was utilized by the Department of Transportation?