1. An arrangement for determining set point values for controllable elements in a network including one of a supply network, a water network, or a water supply network, the arrangement comprising: a management system processing unit for driving elements of the network and a plurality of other processing units; at least one simulation processing unit with a simulation environment for generating a hydraulic simulation model of the network, which relates to a plane of nodes that include distribution and withdrawal points of the network; and an optimization processing unit with an optimization environment for converting and simplifying the hydraulic simulation model, wherein the optimization environment receives exported data from the simulation environment, generates a simplified optimization model from the exported data through an algorithm that is implemented through program code executed by a processor, and uses the optimization model and at least one of received additional data and measurement and field data to calculate optimized schedules as temporally changeable set point value series for driving controllable elements in the network and providing the schedules to the management system processing unit, wherein said exported data describes a physical structure of the hydraulic simulation model and elements thereof, wherein the algorithm reduces a number of existing model nodes and model equations in the simplified optimization model, wherein the simulation processing unit is configured to, in real-time, read values measured in real-time from the management system and the simulation is based on the real-time data, wherein the optimization unit takes into consideration variable real-time status information by dynamically calculating the schedules anew and matching them to a new situation once the simulation model has also been correspondingly matched, and wherein each processing unit is included in at least one processor.