Using interactive evolutionary computation (IEC) with validated surrogate fitness functions for redistricting
Christine Chou, Steven Orla Kimbrough, John Sullivan-Fedock, Charles Jason Woodard, Frederic H. Murphy · 2012
We describe a novel use of evolutionary computation to discover good districting plans for the Philadelphia City Council. We were able to discover 116 distinct, high quality, legally valid plans. These constitute a rich resource on which stakeholders may base deliberation. The exercise raised the issue of how to deal with large numbers of plans, especially with the aim of avoiding gerrymandering and promoting fairness. Interactive Evolutionary Computation (IEC) is a natural approach here, if practicable. The paper proposes development of Validated Surrogate Fitness (VSF) functions as a workable and generalizable form of IEC.