Patent ID: 8321178

Claim:
A plant facility managing system comprising: a facility input unit receives facility parameters held by a plurality of facilities operating inside a plant; a diagnosis processing unit receives the facility parameters directly from the facility input unit and executes predetermined computations on the received facility parameters; a diagnosis output unit receives results of the executed predetermined computations directly from the diagnosis processing unit, and holds the results in the diagnosis output unit; and a virtual facility defined-unit receives the results of the executed predetermined computations directly from the diagnosis output unit and generates a virtual facility where the plurality of facility parameters are gathered, wherein the diagnosis processing unit is provided with a diagnostic program for the virtual facility and receives the facility parameters of the virtual facility as targets for a first diagnosis to thereby execute the predetermined computations, wherein the virtual facility defined-unit acquires results of the first diagnosis directly from the diagnosis processing unit, managing the results of the first diagnosis as the facility parameters of the virtual facility, and wherein the results of the first diagnosis are directly input into the diagnosis processing unit from the virtual facility defined-unit for a second diagnosis.