Model,Best For,Speed,Owner's Upfront Cost,Risk Allocation,Innovation Potential Design-Bid-Build (DBB),"Simple, well-defined projects where cost certainty is paramount and owner control is high.",Slow,High,Owner,Low Design-Build (DB),Complex projects where speed is critical and a single point of responsibility is desired.,Fast,High,Design-Builder,Moderate Public-Private Partnership (P3),"Large-scale, long-life infrastructure assets requiring significant private financing and operational expertise.",Fast,Low,Private Partner,High