A vibration diagnosis is performed by using a vibration mode interactive query
section grasping vibration event of a machinery such as turbine rotor and characteristic
feature thereof from detected data information, a vibration factor diagnosis section
estimating a vibration factor based on the information from the vibration mode
interactive query section, and a diagnosis result display section indicating the
estimated vibration factor and a guidance for countermeasure to be taken against
the vibration factor.
