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Unformatted text preview: (primarily SRR, PDR, CDR, and FRR)
on issues of design, materials, workmanship, fabrication
and verification processes, and other characteristics that
could degrade product system quality.
6.3.2 Quality Assurance Tool and Techniques
s PCA/FCA . The Physical Configuration Audit (PCA) verifies that the physical configuration of the system corresponds to the approved "build-to" (or "code-to") documentation. The Functional Configuration Audit (FCA)
verifies that the acceptance verification (usually, test)
results are consistent with the approved verification
requirements. (See Section 4.8.4.)
In-Process Inspections. The extent, timing, and
location of in-process inspections are documented in the
quality assurance program plan. These should be
manufacturing/fabrication and verification program
plans. (See Sections 6.6 and 6.7.)
QA Survey. A QA survey examines the operations, procedures, and documentation used in the project, and
evaluates them against established standards and
benchmarks. Recommendations for corrective actions
are reported to the project manager.
Material Review Board. The Material Review Board
(MRB), normally established by the project manager and
chaired by the project-level quality assurance engineer,
performs formal dispositions on nonconformances.
6.4 Maintainability Maintainability is a system design characteristic
associated with the ease and rapidity with which the
system can be retained in operational status, or safely
and economically restored to operational status
following a failure. Often used (though imperfect)
measures of maintainability include mean maintenance
downtime, maintenance effort (work hours) per
operating hour, and annual maintenance cost. However
measured, maintainability arises from many factors: the
system hardware and software design, the required skill
levels of maintenance personnel, adequacy of diagnostic and maintenance procedures, test equipment
effectiveness, and the physical environment under
which maintenance is performed.
6.4.1 Role of the Maintainability Engineer Maintainability engineering is another major
specialty discipline that contributes to th...
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