Failure diagnosis method, failure diagnosis apparatus, image forming apparatus, program, and storage medium

A failure diagnosis apparatus for diagnosing failure occurring in an image forming apparatus, the failure causing defect in an image output from the image forming apparatus, the failure diagnosis apparatus comprising:

• a failure diagnosis section that analyzes operation state signals based on a failure probability model, which is obtained by modeling a cause of the failure occurring in the image forming apparatus with using probabilities, to execute failure diagnosis with respect to each of constituent members constituting the image forming apparatus, wherein:
• the operation states signals are automatically acquired in the image forming apparatus during the image forming apparatus operating in different operation conditions, respectively.

A storage medium readable by a computer, the storage medium storing a program of instructions executed by the computer to perform a function for diagnosing a failure occurring in an image forming apparatus, the failure causing defect in an image output from the image forming apparatus, the function comprising:

• acquiring operation state signals indicating operation states during the image forming apparatus operating in different operation conditions, respectively;
• analyzing the acquired operation state signals based on a failure probability model, which is obtained by modeling a cause of the failure occurring in the image forming apparatus with using probabilities, to execute failure diagnosis with respect to each of constituent members constituting the image forming apparatus.