The Reason Foundation's "Due Diligence Report" (2008) projected that the final cost for the complete system (including both Phases I, II and an additional East Bay phase) would be $65.2 to $81.4 billion (2008). Current estimates from the Authority estimate a total cost for Phase 1 of $64.2 billion. The Authority is using "Design-Build" construction contracts to counter the tendency toward cost over-runs. All of the construction is to be done via "design-build" proposals wherein each builder is given leeway in the design and management of construction, but not the ability to run back with contract change orders except for extraordinary problems. The builder is given specifications but also given the freedom to meet them in their own way, plus the ability to modify the construction plans in an expeditious and cost-effective manner.