System Design Review
A System Design Review (SDR) is a scheduled review of many government-contractor relations, which ensures continuous involvement throughout a program. The SDR was originally defined in the Air Force's MIL-STD-1521.
The SDR is a technical review conducted to evaluate the manner in which a project's system requirements have been allocated to configuration items, manufacturing considerations, next phase planning, production plans, and the engineering process that produced the allocation. This review is conducted when the system definition is at a point where system characteristics and configuration items are defined. A successful SDR establishes a 'functional baseline'.