GENERATION DEVICE, GENERATION METHOD, AND GENERATION PROGRAM

A sensing unit (152) of a generation device (10) senses anomaly of a network based on information having a plurality of items related to communication in a network. An identification unit (154) identifies a cause of anomaly corresponding to each piece of information when anomaly is sensed by the sensing unit (152). A pattern generation unit (155) generates, based on values of the items in the information and the cause of anomaly identified by the identification unit (154), a cause-of-anomaly pattern for each predetermined set of pieces of the information.