Experimentation were conducted on convergence speed for different crossover operators used in
solving two test problems with a size of 20 facilities (Nugent, et aL 1968) and 90 facilities (Skorin-Kapov, 1990). It was concluded that a revised partially mapped crossover (PMX) with a random
crossing is performing better than other crossover operators to obtain a solution of 2596 for 20
facilities.