Interactive Evolutionary Computation

Interactive Evolutionary Computation (IEC) can handle such optimization problems where the objectives are non-commensurable or explicitly/mathematically not available.
IEC is a technique from the class of evolutionary algorithms (EAs), whose fitness function is replaced by a human. The human user selects one or more individual(s) which survive(s) and reproduce(s) (with variation) to constitute a new generation.

See the iec.m file for brief example.
See http://www.fmt.vein.hu/softcomp/EAsy/index.html for more help.