Select Use Fixed Seed to manually set the seed in the corresponding
text box. Many design algorithms (for example, DOE techniques) use random numbers
to generate parameter values (or a combination of parameter values) to use when
searching the design space. If you run a simulation process with one of these design
algorithms and run it a second time, you will not get the same results (though you
will often get near the same solution, but through a different path). If you want
the simulation process execution to follow a consistently repeatable path, you must
set a fixed seed for the random number generator to use when it provides random
numbers (otherwise, it often uses something like the current time in milliseconds).
With a fixed seed, the random number generator always produces the same sequence of
random numbers. |