The main purpose of this study is to find out a good solution to the vehicle routing problem considering heterogeneous vehicles. This problem tries to solve the generation of paths and the assignment of buses on these routes. The objective of this problem is to minimize the number of vehicles required and to maximize the number of demands transported. This paper considers a Memetic Algorithm fo...

The Center for the Management of Information (CMI) at the University of Arizona worked with the US Navy Commander, Third Fleet (Third Fleet) to overcome limitations of performing closely coordinated staff work on board a US Navy ship. Third Fleet is required to collaborate with hundreds of people internally and with military and civilian organizations both nationally and internationally. Third ...

The airline fleet assignment problem involves assigning aircrafts to flights to maximize profit. Different fleet assignment solutions cause dramatically different performance in subsequent crew planning and operational processes. We have developed an integrated fleet and crew robust planning method to provide fleet assignment solutions that are both friendly to crew planning and robust to real ...

We consider a variation of the integrated scheduling problem where the operations of a capacitated facility and a fleet of heterogeneous vessels must be sequenced to minimize the operating cost during a multi-period production and distribution process. We prove the NP-hardness of the problem, analyze the problem properties, and propose a partial linear-programming relaxation based heuristic app...

In recent years, rich vehicle routing problems have been considered with particular attention by many researchers. In this paper a specific case is analyzed, which includes multiple time windows constraints and heterogeneous fleet of vehicles. A measure of difficulty of the instances is proposed and some elements that have an impact on it are analyzed. Furthermore, two heuristic algorithms are ...

Making decisions about the structure of a future military fleet is challenging. Several issues need to be considered, including multiple competing objectives and the complexity of the operating environment. A particular challenge is posed by the various types of uncertainty that the future holds. It is uncertain what future events might be encountered and how fleet design decisions will influen...