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To reduce the turnaround time of a vessel in a container terminal, the performance of automated guided vehicles (AGVs) which carry on the transportation of containers between quayside and yard is crucial. A good dispatching strategy for AGVs should be able to minimize the waiting or idle time of the quay cranes by assigning vehicles to loading or unloading jobs with a minimum total delay time. The...
Two optimal algorithms, MTA∗ and MT-RBA∗, are presented to find the optimal yard crane (YC) job sequence for serving a fleet of vehicles for delivery and pickup jobs with scheduled deadlines and predicted vehicle arrival times. The objective is to minimize the total tardiness of incoming vehicle jobs. This is important for minimizing vessel turnaround time. In the search for an optimal job sequence,...
Yard Crane (YC) deployment in a multi-berth terminal is a very complex problem. The total amount of work to the entire terminal yard changes dynamically over time. The levels of workload to different parts of the yard also vary greatly and change over time. So the YC deployment algorithm plays a critical role in increasing YC productivity and reducing vehicle waiting times in the yard. This paper...
Stowage planning for container ships is a core activity of shipping lines. As the size of containership increases, generating a stowage plan with good safety and stability for a large containership becomes increasingly difficult. In this paper, we present an automated stowage planning system for large containerships which consists of three modules: the stowage plan generator, the safety and stability...
The problem of yard crane dispatching in container terminals is addressed in this paper. We proposed two new hybrid algorithms which combine the advantages of A* heuristic search and Recursive Backtracking with prioritized search order to accelerate the solution process. The algorithms proposed use real time data-driven simulation to accurately predict the time taken by the yard crane in performing...
This paper studies the problem of real time yard crane dispatching in container terminals. Many technologies, including transponders, RFID and GPS have been used in the container terminal setting for real-time tracking of terminal equipment. A judicious integration of real-time data into the yard crane management system will allow better utilization of terminal resources to improve overall terminal...
We address the problem of dispatching a yard crane in its appointed zone of a container terminal. The objective of yard crane dispatching is to determine a sequence for handling all coming jobs within the zone that minimizes the average vehicle waiting time. We propose 2 modified A* search algorithms with admissible heuristics to provide fast and optimal dispatching solution. Simulation results show...
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