The roulette wheel selection method is used for selecting all the individuals for the next generation. It is a popular selection method used in a genetic algorithm. A roulette wheel is constructed from the relative fitness (ratio of individual fitness and total fitness) of each individual.
To determine the winning number, a croupier spins a wheel in one direction, then spins a ball in the opposite direction around a tilted circular track running around the outer edge of the wheel.
