Due to their complex functions and dynamics, ports have a complex structure. Complex structures are investigated through simulation techniques instead of analytical methods. Simulation of port systems can be carried out for different goals such as port design, planning, capacity increase, and productivity. In this study, bottleneck points were investigated under overloading conditions. Based on the results generated through simulation experiments, it was determined that the most critical bottleneck points are created by loading/unloading vehicles. An investment strategy was applied to the model at this point for load balancing of the port. As a result, simulation was used to study improvements by adding resources within economic limitations.

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Objective: Efforts to reduce water consumption in hospitals as much as possible and efficient use of water are very important both for the environment and for the economy of public institutions. In this study, it was determined how efficiently the water distributed to the hospitals in the provinces was used. The efficient ones have been identified and it has been mentioned that inefficient provinces should imitate which provinces.Methods: Data envelopment analysis (DEA) method was used to determine the water use efficiencies of the hospitals in the study. In the model, the amount of water distributed to hospitals was used as input; the number of hospitals in the provinces, city population, total days of hospitalization in hospitals, number of family medicine units, number of application for primary, second-line and tertiary healthcare services were used as output.The DEA model was established as input oriented with both constant return to scale(CCR) and variable return to scale (BCC). Results