An operation management apparatus for discerning a bottleneck of a system in an execution environment of a migration-destination without operating the system in the execution environment of the migration-destination is provided. The operation management apparatus (100) includes a correlation model storage unit (112) and a prediction model generation unit (105). The correlation model storage unit (112) stores a correlation model (260) indicating a correlation for each pair of one or more metrics in a state of executing a predetermined program processing in a first processing system. The prediction model generation unit (105) generates, by correcting the correlation model (260) of the first processing system using benchmark performances acquired in a state of executing a predetermined benchmark processing in the first processing system and a second processing system, a prediction model (370) of a correlation model in a state of executing the predetermined program processing in the second processing system.