Test Problems of Delivery and Pickup Problems with Time Windows

Simultaneous Delivery and Pickup Problem with Time Windows
(Vehicle Routing Problem with Simultaneous Delivery and Pickup and Time Windows)

    100-customer test problems
    small scale test problems (5, 10, 25, 50 customers)
    Related article: Wang, H.-F., Chen, Y.-Y. 2012. A genetic algorithm for the simultaneous delivery and pickup problems with time window. Computers and Industrial Engineering, 62, 84-95.

Flexible Delivery and Pickup Problem with Time Windows
(related to the Mixed Vehicle Routing Problem with Backhauls and Time Windows)

    100-customer test problems
    small scale test problems (5, 10, 25, 50 customers)
    Related article: Wang, H.-F., Chen, Y.-Y. 2013. A coevolutionary algorithm for the flexible delivery and pickup problem with time windows. International Journal of Production Economics, 141(1), 4-13

Fuzzy Flexible Delivery and Pickup Problem with Time Windows

    100-customer test problems
    small scale test problems (5, 10, 25 customers)
    Related article: Chen, Y.-Y., Wang, H.-F. 2013. Fuzzy credibility approach to the fuzzy flexible delivery and pickup problem with time windows. Advances in Fuzzy Sets and Systems, 15(1). 43-71.

Our solutions for the datasets were showed infeasible in 2021/08/23 by a french PhD student, Maxime Agius ( maxime.agius@emse.fr ).
The reason may be that my code failed to check pick-up. Therefore, our results for the datasets in our papers are no longer valid.
Ying-Yen Chen