Values of input parameters are set. Simulations are executed in parallel for
individual sets of input parameters by a plurality of processors to obtain design
values which are execution results. The obtained design values are compared with
the design condition. Directory files are constructed for plural kinds of input
parameters corresponding to design values satisfying the design condition. Accumulative
distribution in the distribution of parameter input values are determined in respect
of the individual kinds of input parameters. Input values of parameters to be referred
are extracted on the basis of values of the accumulative distribution every kind
of input parameter. The kind of input parameter, the extracted input values and
the number of the extracted input values are displayed through an input interface
every kind of input parameter.
