A system is configured to generate an alarm when an anomaly occurs at a network infrastructure element. The system includes a transceiver configured to receive data associated with a performance indicator on a predefined basis. The system also includes a processor configured to use the received data to determine a normalized trend for the performance indicator for at least one of a given network infrastructure element and a given time period. The processor is further configured to apply a degree of deviation to the determined normalized trend for at least one of the given network infrastructure element and the given time period to generate an adaptive threshold for the performance indicator. An alarm generator generates an alarm to indicate an anomaly at the given network infrastructure element when newly received data associated with the performance indicator is beyond the adaptive threshold associated with the performance indicator.