1. A computer implemented method, using a Central Management Node, for enabling localization of a network fault associated with a service, said method comprising the steps of: obtaining information related to a service associated network fault event; determining a service related record based on the obtained information; extracting, using a processor, a record data set for the service related record from a subsystem database, the record data comprising at least one type of information associated with the service, among the types: time information, location information, identity information and statistics information; determining, using the processor, a key table comprising at least one type of information associated with the service, among the types: time information, location information, identity information and statistics information, based on the extracted record data set; matching, using the processor, the at least one type of information associated with the service, among the types: time information, location information, identity information and statistics information of the key table with a subsystem database record set, wherein the matching comprises finding key table records that match to subsystem database records; attaching matched record data to the key table, merging the key table with attached matched record data with the extracted record data set; determining a service performance indicator, based on the obtained merged matched record data set, wherein determining the service performance indicator comprises determining a subsystem specific performance related end-score associated with the service related network fault event; and performing a multi-layer water flow analysis of subsystem specific performance related indicators, wherein the analysis obtains localization information of the network fault, wherein a data record information set comprising the matched database records and the extracted at least one record data set is obtained.