On the Choice of the Offspring Population Size in Evolutionary Algorithms

  • Authors:
  • Thomas Jansen;Kenneth A. De Jong;Ingo Wegener

  • Affiliations:
  • FB Informatik, LS 2, Universität Dortmund, 44221 Dortmund, Germany;Krasnow Institute, George Mason University, Fairfax, VA 22030, USA;FB Informatik, LS 2, Universität Dortmund, 44221 Dortmund, Germany

  • Venue:
  • Evolutionary Computation
  • Year:
  • 2005

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Abstract

Evolutionary algorithms (EAs) generally come with a large number of parameters that have to be set before the algorithm can be used. Finding appropriate settings is a difficult task. The influence of these parameters on the efficiency of the search performed by an evolutionary algorithm can be very high. But there is still a lack of theoretically justified guidelines to help the practitioner find good values for these parameters. One such parameter is the offspring population size. Using a simplified but still realistic evolutionary algorithm, a thorough analysis of the effects of the offspring population size is presented. The result is a much better understanding of the role of offspring population size in an EA and suggests a simple way to dynamically adapt this parameter when necessary.