This application discloses a system implementing tools and mechanisms to receive a target rate for each option available for inclusion in a harness family, determine combination take rates for different combinations of the options based on the target rates for the options, and utilize the combination take rates and the combinations of the options to identify one or more wire harnesses, each including a different set of the options, in the harness family. The tools and mechanisms can determine the combination take rates by estimating values for the combination take rates corresponding to the combinations of the options, and iteratively adjusting the values for the combination take rates based on the target rates for the options.