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 for driving elements of the network and a plurality of processing units; at least one simulation 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 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 flow charts as temporally changeable set point value series for driving elements in the network and providing the driven elements to the management system, wherein said exported data describes a physical structure of the hydraulic simulation model and elements thereof, and wherein the algorithm reduces a number of existing model nodes and model equations in the simplified optimization model.