A management apparatus (102) for managing a plurality of actual devices (104-106) and virtual devices (603, 703), each virtual device providing an operation constructed by combining the functions of the plurality of actual devices detects (503, S1104) a change of an optional function of the actual devices. The apparatus changes (502, S1108), in correspondence with the detected change of the optional function, the attribute of the first virtual device including an actual device of which the optional function has been changed. When the second virtual device which has the same attribute as the changed attribute of the first virtual device is determined, the apparatus changes (508, S1115) the configuration of the second virtual device so as to use the actual device. The apparatus inquires (507, S1114) of a user whether or not to reconstruct the second virtual device so as to use the actual device.