A time in which an administrator identifies a cause of a failure when the abnormality is detected in a plurality of servers is shortened.An operation management apparatus includes a failure detection unit 26 and a spread determination unit 27. The failure detection unit 26 obtains measured values of a plurality of performance metrics with respect to each of a plurality of target apparatuses to be monitored that are connected to a common apparatus and detects an abnormal item which is the performance metric whose measured value is abnormal with respect to each of the plurality of target apparatuses to be monitored. The spread determination unit 27 outputs the remaining abnormal item excluding the abnormal item detected in all the plurality of target apparatuses to be monitored from the abnormal item of each of the plurality of target apparatuses to be monitored.