Abstract
Container terminals (CTs) play an essential role in the global transportation system. To deal with growing container shipments, a CT needs to better solve the three essential seaside operational problems; berth allocation problem (BAP), quay crane assignment problem (QCAP), and quay crane scheduling problem (QCSP), which affect the performance of a CT considerably. In past studies, the three seaside operational problems have often been solved individually or partially, which is likely to result in poor overall system performance. However, solving the three seaside operational problems simultaneously is in fact a very complicated task. In this research, we dealt with the three seaside operational problems at the same time by using a novel high-level Petri net, termed an Object-Oriented and Timed Predicate/Transition Net (OOTPr/Tr net). After defining the three seaside operational problems formally, we integrated them as a three-level framework that was further transformed into an OOTPr/Tr net model. Then, using the Prolog programming language, we implemented this model as a simulation tool to find the best solution based on the various combinations of heuristic rules used.
Highlights
Container terminals (CTs), connecting seaside and landside transportation, are an essential part of the global transportation system
We have modeled and solved the three seaside operational problems in an integrated way
As most past studies were found to have solved the three seaside operational problems separately, which tends to result in poor overall system performance, solving the three seaside operational problems together is necessary
Summary
Container terminals (CTs), connecting seaside and landside transportation, are an essential part of the global transportation system. The first level deals with the BAP in which ships are assigned to berths based on the workloads on the berths; the second level deals with the QCAP and QCSP in which the tasks of ships are assigned to QCs based on the workloads of the QCs; the third level determines the beginning and ending times of each task through discrete event simulation This framework has been first transformed into a high-level Petri net, termed as an Object-Oriented and Timed Predicate/Transition Net (OOTPr/Tr net) and was implemented using the Prolog programming language as an evaluation tool.
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