Image forming system, prognosis criterion setting apparatus, prognosis apparatus, image forming apparatus and non-transitory computer-readable recording medium

A prognosis apparatus comprising:

• an acquisition unit that acquires criterion information which is a criterion to predict occurrence of a trouble, wherein for a monitoring item whose detection values, which were detected during an image forming operation in an image forming apparatus in which a trouble occurred within a predetermined time period after an operating condition of the image forming operation was changed, were changed from a noinial state to an abnormal state after the operating condition was changed, the criterion information is set based on characteristic information indicating a variation state of the detection values which were detected before an operating condition is changed;
• a generation unit that, for the monitoring item relating to the criterion information acquired by the acquisition unit, generates characteristic information indicating a variation state of detection values in an image forming apparatus of a prognosis target;
• and
• a prognosis unit that predicts as to whether or not a trouble occurs in the image forming apparatus of the prognosis target after the change of the operating condition in the image forming apparatus of the prognosis target, based on a difference between the criterion information acquired by the acquisition unit and the characteristic information generated by the generation unit.

An image forming apparatus comprising:

• an acquisition unit that acquires criterion information which is a criterion to predict occurrence of a trouble, wherein for a monitoring item whose detection values, which were detected during an image forming operation in an image forming apparatus in which a trouble occurred within a predetermined time period after an operating condition of the image forming operation was changed, were changed from a normal state to an abnormal state after the operating condition was changed, the criterion information is set based on characteristic information indicating a variation state of the detection values which were detected before an operating condition is changed;
• an image forming unit that forms an image on a recording medium;
• a detection unit that detects a value of the monitoring item relating to the criterion information acquired by the acquisition unit during operation of the image forming unit;
• a generation unit that, for the monitoring item relating to the criterion information acquired by the acquisition unit, generates characteristic information indicating a variation state of the detection values which are detected by the detection unit;
• and
• a prognosis unit that predicts as to whether or not a trouble occurs in the image forming apparatus of a prognosis target after the change of the operating condition in the image forming apparatus, based on a difference between the criterion information acquired by the acquisition unit and the characteristic information generated by the generation unit.

A non-transitory computer readable recording medium storing a program that causes a computer to execute a prognosis process, the process comprising:

• acquiring criterion information which is a criterion to predict occurrence of a trouble, wherein for a monitoring item whose detection values, which were detected during an image forming operation in an image funning apparatus in which a trouble occurred within a predetermined time period after an operating condition of the image forming operation was changed, were changed from a normal state to an abnormal state after the operating condition was changed, the criterion information is set based on characteristic information indicating a variation state of the detection values which were detected before an operating condition is changed;
• for the monitoring item relating to the criterion information acquired by an acquisition unit, generating characteristic information indicating a variation state of detection values in an image forming apparatus of a prognosis target;
• and
• predicting as to whether or not a trouble occurs in the image forming apparatus of the prognosis target after the change of the operating condition in the image forming apparatus of the prognosis target, based on a difference between the acquired criterion information and the generated characteristic information.