| 摘要 |
A group management apparatus is connected to first to nth management apparatus that collectively manage a plurality of installation equipment belonging to first to nth installation equipment groups, and collectively manages the first to nth installation equipment groups. One or more interrogation processors repeatedly carry out interrogation processing for the first to nth management apparatus regarding operating conditions of the installation equipment collectively managed by the first to nth management apparatus. Preferably, an allocation unit allocates different interrogation processors to the first to nth management apparatus, respectively, one at a time, and allocates other allocation processors to the first to nth management apparatus according to an interrogation processing state of the installation equipment by at least one of the interrogation processors.
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