1. A computerized method for scalable management optimization of pressurized liquid distribution networks, comprising: receiving a network model representing a pressurized liquid distribution physical network, said network model having a plurality of liquid flow variables; simulating said network model by solving a plurality of non-linear mathematical equations representing the behavior of said plurality of liquid flow variables, thereby generating at least one result set comprising at least one result value for each of said plurality of liquid flow variables; feeding said at least one result set to said plurality of non-linear mathematical equations; linearizing said plurality of non-linear mathematical equations; receiving a plurality of network model optimization requirements from a user; optimizing linarized said plurality of mathematical equations according to received said plurality of network model optimization requirements, thereby generating at least one optimized linearized solution for linearized said plurality of mathematical equations; performing a local search starting from said at least one optimized solution using linearized said plurality of mathematical equations, thereby generating at least one locally improved solution.