ABSTRACT
An irrigation system is a comprehensive system which contains two main components: (1) hardware — the hydraulic network and (2) software — the operation plans. Once the hardware is set up, the software entirely dominates the actual performance of the system in order to meet crop-water demands. Management of irrigation is the answer to the question, when to irrigate a certain set of plots with predetermined quantities of water. Although a simple question, the answer becomes more and more complicated, depending on the constraints imposed on the planner. The more constraints there are the more complicated is the process of scheduling.
