In order to provide an operation and maintenance planning aiding system for a
power generation installation which prepares an operation plan for a plurality
of power generation units by making use of actual plant data and based on a total
judgment including a variety of circumstances of the machine and apparatus or the
parts thereof in the power generation units, in the system the plurality of power
generation units 41, 42, 51 and 52, a power supply command center
3 and a service center 1 are arranged and connected via a communication
network 6, the service center 1 obtains the plant data via the communication
network 6 from the plurality of power generation units 41, 42, 51 and
52, calculates in real time a power generation efficiency of a concerned
power generation unit for every plurality of power generation units 41, 42 51
and 52 by making use of the obtained plant data and design data of the
concerned power generation unit and prepares an operation and maintenance plan
for each of the power generation units based on the calculated power generation efficiency.
