An operations management apparatus comprising: correlation model storing means for storing a correlation model including one or more correlations detected for one or more pairs of metrics in first plural metrics in a system, the correlation for a pair of metrics being approximated by a correlation function which approximates a relation between metrics of the pair on the basis of sequential performance information which is collected for a predetermined period of time; and correlation model updating means for, in the case that one or more metrics are added in said system, detecting a correlation for each of one or more pairs of metrics obtained by excluding said one or more pairs of metrics in first plural metrics for which existence of a correlation has been judged already, from pairs of metrics in second plural metrics including said added metrics and said first plural metrics, and updating said correlation model by adding the detected correlation to said correlation model, wherein the operations management apparatus further comprises performance information storing means for storing measured values of each of a plurality of metrics sequentially, wherein a correlation function for a pair of metrics in said performance information storing means is determined on the basis of said measured values of the pair of metrics measured for a predetermined period of time, and a correlation for the pair of metrics is detected on the basis of a conversion error by the determined correlation function; and fault analyzing means for detecting a system fault and specifying a cause through detecting correlation destruction of a correlation, which is included in said correlation model. correlation model storing means for storing a correlation model including one or more correlations detected for one or more pairs of metrics in first plural metrics in a system, the correlation for a pair of metrics being approximated by a correlation function which approximates a relation between metrics of the pair on the basis of sequential performance information which is collected for a predetermined period of time; and correlation model updating means for, in the case that one or more metrics are added in said system, detecting a correlation for each of one or more pairs of metrics obtained by excluding said one or more pairs of metrics in first plural metrics for which existence of a correlation has been judged already, from pairs of metrics in second plural metrics including said added metrics and said first plural metrics, and updating said correlation model by adding the detected correlation to said correlation model, wherein the operations management apparatus further comprises performance information storing means for storing measured values of each of a plurality of metrics sequentially, wherein a correlation function for a pair of metrics in said performance information storing means is determined on the basis of said measured values of the pair of metrics measured for a predetermined period of time, and a correlation for the pair of metrics is detected on the basis of a conversion error by the determined correlation function; and fault analyzing means for detecting a system fault and specifying a cause through detecting correlation destruction of a correlation, which is included in said correlation model.