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Klein (1998) breaks
the development of simulation into two basic types. In the Monolithic design technique, all
relevant information about the model is kept in the model itself. These systems are usually built from
scratch and do not share the components that comprise them. The decline of this model occurred in the
mid 1990’s when the Administration lowered Defense Department budgets. There became a need for greater efficiency
in the creation of the simulation software.
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The distributed
model breaks the total model into a set of sub-models. These sub-models can be interchanged
between systems to lower total development costs. High Level Architecture was developed by
the US Department of Defense and is an upcoming IEE simulation
interoperability standard.
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Under this standard,
HLA defines the behavior of the overall distributed model, called a
Federation, and the component pieces, called Federates. The infrastructure specification details
how the Federates communicate through the Runtime Interface (RTI). Finally, the Object Model Template (OMT)
defines the documentation process for Federations and Federates.
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