Design Description Element
Expectations
System Architecture
The segment should present the key design areas of their system; Functional, Hardware and Software. Each area should be presented graphically as an architectural diagram. Each will be expanded upon during the Functional, Hardware and Software segments of the PDR presentation. Sub-Segment Architecture Diagram Hardware Implementation & Deployment Diagram Software Implementation & Deployment Diagram
Context Diagram
The segment should present a context diagram illustrating where their segment functionally, physically and logically (SW) fits within the larger system.
Interface Diagram
The segment should present an interface diagram illustrating the physical and logical interfaces with entities outside the segment.
Functional Architecture
The segment should demonstrate they understand the functions required of their system. The segment should present the allocations of functions to HW and SW elements of the design.
Key Function(s) Design
The segment should demonstrate they understand the driving requirements of their segment that support the overall program.
Requirements
The segment should demonstrate the flow down and understanding of system level requirements to Segment and Element.
OPSCON
The segment should demonstrate they understand the necessary behavior of their segment in support of program requirements and in conjunction with other segments.
Risk
The segment should demonstrate they understand and are managing identified areas of design and development risk.
Systems Analysis and Studies
The segment should demonstrate they have performed, with adequate rigor, the analysis of their preliminary design. The segment should present design trades and supporting material for design decisions.
Design Margins
The segment should present design analysis demonstrating design closure and indicating design margin, where applicable.
Development Assurance
* Requirements Verification Plans & Status
* Integration & Test
* Software Engineering
* Specialty Engineering
* Reliability/Availability Allocations
* Maintainability
* Logistics
* Safety
Program Wrap-Up
* Actions from SRR
* Items Closed
* Mitigation Plans for Open Items
* Plan to CDR
* Exit Criteria
Government Caucus and Assessment
- Typical PDR Exit Criteria
Government concurrence that the Preliminary Design is complete and that the contractor has demonstrated program has acceptable risk in proceeding into Critical Design phase.