A method for designing an engine case static structure of a gas turbine engine
includes creating signals representing an engine case static structure knowledge
base of information. The knowledge base has a plurality of design rule signals
with respect to a corresponding plurality of parameter signals of associated elements
of an engine case static structure, wherein the knowledge base comprises at least
one data value signal for each of the plurality of design rule signals. A desired
data value signal is entered for a selected one of the plurality of parameter signals
of an associated element of the engine case static structure and compared to the
corresponding data value signal in the knowledge base for the corresponding one
of the plurality of design rule signals. Signals representative of a geometric
representation of the selected parameter signal may be created.