In one embodiment, the invention includes sorting a set of constraints based on weights associated with each constraint, the constraints being capable of being satisfied based on values selected for corresponding associated parameters, selecting a constraint that is unsatisfied and that has the greatest weight, selecting parameters associated with the constraint and finding parameter values to satisfy the constraint, after satisfying the selected unsatisfied constraint, selecting a further unsatisfied constraint having the next greatest weight and finding values for associated parameters to satisfy the further constraint, and repeating the selecting of further constraints and the finding of values for associated parameters.