What - Failure Mode Dependency Modeling is a
dependency modeling approach that focuses purely on failure modes. By doing so,
it can draw a high-level meaning from dependencies, whereas the dependency
approach remains, like machine language, somewhat undecipherable.
Why - Failure Mode Dependency Models were
established in an attempt to reduce the amount of data entry and to lessen the
amount of abstraction of a simple dependency model. By focusing purely on
failure modes, a Failure Mode Dependency Model can be made to correlate well
with a reliability engineering process.
When - Failure Mode models are useful at
describing models from which low-level diagnostic strategies can be
created. However, the lack of Functional information precludes it from
effective use for concept exploration, or higher-level strategies, where both
functions and failure modes mix.
History - Failure Mode dependency models
were formally first used as part of the WSTA program. This program was
developed under Department of Defense funding as an approach utilizing the
Dependency Model. As it used the same Dependency Modeling concept invented by
Ralph De Paul, DSI International was subcontracted to assist in its
development. Today, the program is considered obsolete, though
attempts have been made to build additional products from its rather
limited diagnostic approach.
Related Links - Functional
Dependency Models, Hybrid Models