An information integration unit (110) generates integrated data (500) based on single device data (300) and composite device data (400). The individual device data shall contain, for each individual device, an individual device identifier (311) and another device identifier (314) for each of one or more other devices. the interconnection device contains, for each group of interconnection devices, a connection device identifier (421),Time interval information (424, 425) and an individual device identifier (423) from each of one or more individual devices. The integrated data shall contain interconnection information (520) for each group of an individual facility and one or more other facilities, and shall contain interconnection information (530) for each group of an interconnector and an individual facility. the interconnection information (530),the interconnector and the individual device, including time-space information (522),indicate a period during which the individual device was used for the connection device.
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