Site problemsPreliminary Design Review (PDR)PDR = Approval of the Allocated Baseline - DoD 5000.02 Phase = Engineering and Manufacturing Development (EMD).The PDR is the formal culmination of a series of multi-disciplinary PDRs of the system and of a series ofreviews of individual Configuration Items (CIs) conducted to ensure the system under review can proceed into detailed design and can meet the stated performance requirements within cost (program budget), schedule (program schedule), risk, and other system constraints. For complex systems, a series of PDRs for each subsystems or CI is conducted leading to an overall system PDR.Each PDR is tailored for the review of the technical scope and risk of the system, segment, subsystem, and CI, and made an integral part of the System Engineering Plan (SEP).PDR is scheduled after the availability of the hardware development specification or software architecture and detailed design and software test plans, since the essence of the PDR is to assess the contractor’s approach to meeting the requirements of these documents.PDR Outcomes include:1.Assess the system preliminary design as captured in the performance specifications for each CI in the system, the Allocated Baseline (ABL), and ensure each function in the Functional Baseline (FBL) has been allocated to one or more of the CIs. CIs consist of hardware and software elements and include items such as airframes, avionics, weapons, crew systems, engines, trainers and training.2.The determination of the compatibility of the CIs with performance and engineering speciality requirements of the Hardware Configuration Item (HWCI) development specification.3.Evaluation of the degree of definition and assess the technical risk associated with the selectedmanufacturing methods and processes.4.Establishment of the existence and compatibility of the physical and functional interfaces among the CI and other items of equipment, facilities, computer software, and personnel.5.The measurement of progress, consistency, and technical adequacy of the selected top-level Software Configuration Item (SWCI) designs and test approaches.6.The assessment of the compatibility between software requirements and SWCIs preliminary design7.The PDR evaluation of the preliminary version of the SWCIs operation and support documents.Post PDR