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Unformatted text preview: e expanded technical process are in place.
Preliminary Design Review. The Preliminary Design
Review (PDR) is not a single review but a number of
reviews that includes the system PDR and PDRs
conducted on specific Configuration Items ( CIs).
Purpose —The PDR demonstrates that the
preliminary design meets all system requirements with
acceptable risk. It shows that the correct design option
has been selected, interfaces identified, and verification
methods have been satisfactorily described. It also
establishes the basis for proceeding with detailed design.
Timing —After completing a full functional
Objectives—The objectives of the PDR are to:
• Ensure that all system requirements have been
allocated, the requirements are complete, and
the flowdown is adequate to verify system
Show that the proposed design is expected to
requirements at the Cl level
Show sufficient maturity in the proposed design
approach to proceed to final design
Show that the design is verifiable and that the
risks have been identified, characterized, and
mitigated where appropriate. Criteria for Successful Completion —The following items compose a checklist to aid in determining
readiness of PDR product preparation:
• Can the proposed preliminary design be
expected to meet all the requirements within the
planned cost and schedule?
Have all external interfaces been identified?
Have all the system and segment requirements
been allocated down to the CI level?
Are all Cl "design-to" specifications complete
and ready for formal approval and release?
Has an acceptable operations concept been
Does the proposed design satisfy requirements
critical to human safety and mission success?
Do the human factors considerations of the proposed design support the intended end users'
ability to operate the system and perform the
Have the production, verification, operations,
and other specialty engineering organizations
reviewed the design?
Is the proposed design producible? Have long
lead items been considered? • •
• Do the specialty engineering program plans and
guidance, constraints, and system requirements
for the design engineers to execute the des...
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