abstract = "Crucial to the more widespread use of evolutionary
computation techniques is the ability to scale up to
handle complex problems. In the field of genetic
programming, a number of decomposition and reuse
techniques have been devised to address this. As an
alternative to the more commonly employed encapsulation
methods, we propose an approach based on the division
of test input cases into subsets, each dealt with by an
independently evolved code segment. Two program
architectures are suggested for this hierarchical
approach, and experimentation demonstrates that they
offer substantial performance improvements over more
established methods. Difficult problems such as even-10
parity are readily solved with small population
sizes.",
notes = "GECCO-2007 A joint meeting of the sixteenth
international conference on genetic algorithms
(ICGA-2007) and the twelfth annual genetic programming
conference (GP-2007).