Thinking beyond the group size fetish: towards a new testability
Gould, E.; Hartop, D.
AUTOTESTCON apos;99. IEEE Systems Readiness Technology Conference, 1999. IEEE
Volume , Issue , 1999 Page(s):673 - 684
Digital Object Identifier 10.1109/AUTEST.1999.800442
Summary:This paper exposes some major deficiencies inherent within current
methods for assessing design testability-critical shortcomings that not
only might cause adherence to contracted testability requirements to be
in conflict with long-term maintenance goals (such as life cycle cost
and operational availability), but could also result in evaluations that
fail to predict the actual diagnostic behavior of the system or device.
In recent years, the need to accurately forecast diagnostic performance
has become more essential as more development projects are contractually
linked to the maintenance of the fielded product (as witnessed by the
recent emergence of maintenance warrantees and the combined contracting
of development and maintenance efforts). What is needed are testability
procedures that can better serve long-term maintenance and support
objectives, yet remain true to the discipline's original intent of
providing diagnostics-based feedback in early phases of the development
cycle. Hoping to foster a less conflicted testability practice, this
paper proposes some alternatives to current quantitative methods of
testability assessment that can more accurately predict diagnostic
behavior and more consistently reflect the relationships between a
system or device's diagnostic capability and its life cycle cost and
operational availability
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