xpress cplex runtime comparison results vince fyi comparison computation time results cplex xpress optimization softwares chonawee forwarded chonawee supatgiat corp enron 05 19 2000 03 26 pm chonawee supatgiat 05 17 2000 05 48 pm samer _ takriti enron net stinson gibner hou ect ect ravi thuraisingham enron communications enron communications cc tom halliburton corp enron enron pinnamaneni krishnarao hou ect ect ming lung lee sycamorenet com ming 888 lee aol com subject xpress cplex runtime comparison results hi tested cplex xpress mp optimization software solving network design problem xpress user friendly hence takes less developing time however cplex performs significantly better term computation time especially integer programming result eventhougth xpress easier use cheaper would recommend ebs group use cplex please let know think test problem 10 nodes 77 cables 5 cable speed table represents computation time seconds solving problem second column indicates general integer variables relaxed still keep binary variables lp column represents computational time solving relaxed problem binary integer variable constraints xpress took much time solving case 4 6 stop process report best solutions found graph