An owner concludes with a facility maintenance company a contract for maintenance
of electric facilities and an operation control monitor device installed in a building
of the owner. The electric facility manufacturer gives the company permission to
access the device from a terminal through the Internet as a communication network.
The company receives continuous monitor data items of the electric facilities collected
by the device. The manufacturer accesses the device from a terminal through the
network and also receives the continuous monitor data items of the electric facilities.
