Alternative contracting methods (ACMs) capture the delivery methods that are not design-bid-build (D-B-B), low bid, or traditional federal aid. Common ACMs used by state departments of transportation (DOTs) include design-build (D-B), construction manager/general contractor (CM/GC), progressive design-build (P-D-B), public-private partnerships (P3), and indefinite delivery/indefinite quantity (IDIQ), which is also called job order contracting. NCHRP Synthesis 622: Post-Construction Evaluation Practices f…