Wang, Hsiao-Fan; Chen, Ying-Yen - In: International Journal of Production Economics 141 (2013) 1, pp. 4-13
This paper addresses a flexible delivery and pickup problem with time windows (FDPPTW) and formulates the problem into a mixed binary integer programming model in order to minimize the number of vehicles and to minimize the total traveling distance. This problem is shown to be NP-hard. In this...