“…Each student had to minimize eight functions (named F 1 to F 8 ), whereas the index in the function name corresponds to its difficulty level. These functions are 1) F 1 = Σm(0, 3) + Σd(1, 2) 2) F 2 = Σm(0, 1, 2, 3, 13, 14) + Σd (12,15) 3) F 3 = Σm(0, 1, 2, 3) + Σd(9, 11) 4) F 4 = Σm(4, 5, 14, 15) + Σd(7, 13) 5) F 5 = Σm(4, 5, 7, 13, 14) + Σd(9, 11, 15) 6) F 6 = Σm(0, 1, 2, 7, 8, 9, 13) + Σd(10, 11) 7) F 7 = Σm(0, 2, 5, 10, 12, 15) + Σd(8, 13) 8) F 8 = Σm(0, 2, 10, 12, 13, 15) + Σd (5,8) The 25 students of Group A had to minimize these functions manually. The 24 students of Group B used DLD-VISU to do the same.…”