Maintainability
Programs
Maintainability Assessment
Maintainability Modeling
Maintainability Demo
Design for Maintainability
DRACAS
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Defect
Report and Corrective Action System
(DRACAS)
DRACAS- is a formal closed-loop reporting system
that requires each reported failure to be analyzed
from an maintainability perspective and if
necessary, followed up with a corrective action.
This system would be used in unison with the
FRACAS.
However, the objective of this data collection
system would be to obtained specific
maintainability data.
The collection of data could start early in a
design and development phases and continue to be
implemented into the operational or fielded phase.
The type of data to be collected, with respect
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to maintainability would ascertain the maintainability
characteristics of a system. This data could include actual
maintenance elapse times, observation on the BIT
performance, discrepancies in technical manuals and
documentation, criteria tied to actual repair actions, and
any supporting dispositions. For example, where it is
observed that for a particular assembly, a large percentage
of these assemblies are returned from a supplier as a
No-Fault-Found (NFF) or No-Evidence-Of-Failure (NEOF). Upon
investigation by the vendor they were unable to locate any
faults associated with the assembly in question and after
testing, to verify its operational status, returned it to
the user as NFF. This type of scenario has an adverse impact
upon the operational support cost of a system. The impact
upon a system's Life Cycle Cost of those items being found
to be NFF is augmented, as there is a cost associated with
removing "serviceable" items from a system and entering
them into the repair loop. The cause of this maybe as a
result of the ineffective diagnostics routine, technical
manuals and/ or training of the maintainers
There are many maintainability issues that could have an
impact upon the operational Life Cycle Cost for a system.
These need to be identified and addressed in a systematic
fashion.
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