fitness function | design games'in form grafiği

let's start to think about design process, as if it is a problem solving activity, what kind of problem solving is it?
>one question is, can we ever have a kind of evaluation function for a design problem, so that all the constraints and criteria are brought together on one level and be pronounced/calculated?
_a variant of above question is: can we produce a series of evaluation functions, that are organized hierarchically, yet still comparable?

0404010:
now i have preliminary answers:
>we might consider several types of evaluation approaches:

1. define rules, constraints and definite targets, and check the proposal in terms of compliance to these,
2. define performance, and optimize parameters in terms of a fitness function,
3. define patterns and features, then measure a proposal's similarity with these

the latter two are easily applicable as knowledge lean approaches in evaluation stages. the first type is also important, but not enough, if we want to "drag" the population towards a solution. nevertheless we should use the first type as well, at definite stages.

i will concentrate on the third option, which seems to be mostly omitted (if not altogether). patterns and features will be derived from existing designs. however this approach doesn't seem sufficient, for attaining full-fledged design solutions which are fine enough to compete with human-designed ones. it should be followed by optimisation processes and supported by constraint checks and resulting corrections.