While there has not been a thorough comparison between these methods, the most popular ones for chemical applications are roulette wheel and tournament selection . An analysis comparing GA parameters for heterogeneous catalysts found that, out of wheel, rank, threshold, and tournament selection methods, 3-way tournament selection was the best . Another technique implemented by De Sousa et al. randomly selects parents from a pool of the previous generation, plus the top 10 individuals obtained thus far . Previous GA implementations in our group used a random selection method by randomly selecting two parents from the top 50% of candidates .