Regional air mobility refers to the transportation of passengers aboard small aircraft over short distances. These operations are challenging due low passenger volumes, competing modes, and high operating costs. Nevertheless, recent convergence new technologies for electric propulsion autonomy brings promise step-changes in both efficiency sustainability. The next challenge is define concepts t...

This paper reports on the modelling and solution of a large industrial combinatorial optimization problem using the ECL i PS e Constraint Logic Programming (CLP) platform. The problem is eet assignment: the assignment of a set of aircraft of diierent types to a predeened shedule of ights. A single underlying model was developed and solved in ECL i PS e. Three optimization methods were applied i...

In this work, a decision tool is developed for a liner shipping company to deploy its fleet considering vessel speeds and to find routes for cargos with transit time constraints simultaneously. This problem is referred as Service level Assignment and Container Routing Problem (SACRP) in the sequel. A Column Generation (CG) algorithm is implemented for the SACRP. Computational experiments are pe...

We consider the problem of finding collision-free trajectories for a fleet of automated guided vehicles (AGVs) working in ship ports and freight terminals. Our solution computes collision-free trajectories for a fleet of AGVs to pick up one or more containers and transport it to a given goal without colliding with other AGVs and obstacles. We propose an integrated framework for solving the goal...

With greater availability of real-time information systems, algorithms are needed to support commercial fleet operators in their decisions to assign vehicles and drivers to loads in a dynamic environment. We present a rolling horizon framework for the dynamic assignment and sequencing of trucks to jobs consisting of picking up and delivering full truckloads when requests for Submitted for prese...

The network design problem in liner shipping is of increasing importance in a strongly competitive market where potential cost reductions can influence market share and profits significantly. In this paper the network design and fleet assignment problems are combined into a mixed integer linear programming model minimizing the overall cost. To better reflect the real-life situation we take into...

This paper focuses on a fleet management problem that arises in container trucking industry. From the container transportation company perspective, the present and future operating costs to minimize can be divided in three components: the routing costs, the resource (i.e., driver and truck) assignment costs and the container repositioning costs (i.e., the costs of restoring a given container fl...

This paper describes methods for optimizing the task allocation problem for a fleet of Unmanned Aerial Vehicles (UAVs) with tightly coupled tasks and rigid relative timing constraints. The overall objective is to minimize the mission completion time for the fleet, and the task assignment must account for differing UAV capabilities and no-fly zones. Loitering times are included as extra degrees ...