Abstract: A network management apparatus including a failure influence calculation unit that calculates, in a case where a communication failure occurs in a plurality of buildings in which communication facilities are accommodated and which correspond to upper layers of a network, an influence of the communication failure, the influence being an influence on other buildings corresponding to lower layers of the network by the occurred failure. Further, there is a priority calculation unit that calculates a priority of a possibility of the buildings in which the occurred failure is to be actually recovered among the buildings in which the failure occurs and which correspond to the upper layers, based on a degree of the communication failure continuously occurring in any building of the network under a condition in which the occurred failure and the influence calculated by the failure influence calculation unit are applied.

Abstract: A network management device includes a priority calculation unit to apply, to a situation in which, when a failure in communication occurs in a plurality of buildings that houses a communication facility. When a condition in which the failure that occurred is assumed to be restored regarding a plurality of combinations of some buildings among the buildings in which the failure has occurred by performing restoration on the communication facility housed in the building is applied, the failure in communication continuously occurs in a building that houses a communication facility used for providing a predetermined type of communication service among the plurality of buildings, a policy that defines weighting corresponding to the situation and calculate, for each of the plurality of combinations, priority of a possible combination of buildings in which the failure that occurred is to be actually restored among the buildings in which the failure has occurred.