Seaport Productivity Research basing on P-time Petri Net

These years the world seaborne trade has been developing considerably, mainly due to the economic globalization and continued development of emerging countries. This world side growth has an influence on the development of ports and maritime terminals. It is always an important target to realize the port running in the maximum productivity with minimum cost, but it is really difficult to find a proper solution to schedule the seaport workflow with the best productivity in real time on considering the complexity of the system, although it just needs to adjust the assignment of the existing distributed resources, such as the cranes, the storages, the vehicles routing etc.. In this paper, by modeling the repetitive and periodic operation process with P-time Petri Net, we propose a method to adjust the initial setting of system's parameters to keep itself run with maximum productivity and minimum cost. Moreover the necessities for changing the parameters of the resources are studied.