Motivated by the collection outsourcing phenomena under Extended Producer Responsibility (EPR), this paper studies a contract design problem for a manufacturer who consigns the used product collection to a collector, while the manufacturer only has incomplete information on the collector's cost....

For the control of single machine and multiple part-types manufacturing systems, the prioritized hedging point (PHP) policy is often used. In this paper, the probability distribution of the system states under this control is analysed. Unlike the work by Shu and Perkins (2001), where the maximum...

This paper studies the vehicle routing problem with multiple trips and time windows, in which vehicles are allowed to perform multiple trips during a scheduling period and each customer must be served within a given time interval. The problem is of particular importance for planning fleets of...