In evolutionary biology, fitness is the relative success in reproduction, or occasionally survival, among members of a group of organisms. In evolutionary computation (or genetic algorithms), fitness is typically an externally imposed measure of "goodness" of an individual in the population, where individuals represent candidate solutions to a problem.
A evolutionary algorithm (or genetic algorithm) employs a fitness function to evaluate the fitness of various solutions to a given problem. The score that each solution receives has consequences on the probability that any particular solution will be used to generate future solutions.
- Evolution, Adaptation, Biology