A formal examination of a program to determine if the design is ready for production and if the prime contractor and major subcontractors have accomplished adequate production planning without incurring unacceptable risks that will breach thresholds of schedule, performance, cost, or other established criteria. PRRs are normally performed as a series of reviews toward the end of Engineering and Manufacturing Development (EMD) phase. A final PRR should occur at the completion of the EMD phase and assess the manufacturing and quality risk as the program proceeds into Low Rate Initial Production (LRIP). Under some circumstances, a PRR may also be appropriate during the LRIP effort to assess manufacturing risk for full-rate production.