After the initial experiments, the proposed approach is run 10 times on each of the 36 newly generated TTRPTW problems. The results for cases with 50 customers and 100 customers are shown in Tables 3 and Table 4, respectively. It
should be noted that the vehicle capacities in the TTRPTW problems with 100 customers are not the same as those used in the initial experimental. It can be seen from Table 3 and Table 4, the difference between the minimum solution and the
average solution is very small, indicating that the proposed SA heuristics is stable when used in solving TTRPTW problems. Thus, the proposed approach is applicable to solving the TTRPTW problems