Diagnosis apparatus and diagnosis method

A diagnosis apparatus for diagnosing an operation of a machine, the diagnosis apparatus comprising:

• a learning model storage unit configured to store a plurality of learning models generated by performing machine learning on physical quantities of a plurality of machines observed during respective operations of the plurality of machines in advance;
• a data acquisition unit configured to acquire a physical quantity of another machine different from the plurality of machines observed during an operation of the other machine;
• a characteristic difference calculation unit configured to calculate characteristic differences between the other machine and the plurality of respective machines using the physical quantity relating to an operation of the other machine acquired by the data acquisition unit and the learning models stored in the learning model storage unit;
• a learning model selection unit configured to select a learning model used in a diagnosis of the operation of the other machine based on the characteristic differences calculated by the characteristic difference calculation unit;
• and
• a diagnosis unit configured to diagnose the operation of the other machine by using the learning model selected by the learning model selection unit.