System and method for diagnosising parts of a printing device to be replaced based on incident rate

A method to diagnose a mechanical part on an image forming device comprising:

• recording an incident count associated with a specific error code and a specific component of the image forming device and monitored by a sensor of the image forming device for a plurality of first time intervals;
• calculating the incident count for each of the plurality of first time intervals;
• marking the incident count for each of the plurality of first time intervals as one of a first rate if the incident count exceeds a first threshold level or a second rate if the incident count is more than 0 but less than the first threshold level;
• cumulating a number of first time intervals with the second rate for a second time interval;
• and
• marking the component as needing to be one of repaired or serviced when the number of first time intervals with the second rate during the second time intervals exceeds a second threshold level.

A diagnostic system for an image forming device comprising:

• a processor;
• a memory coupled to the processor, the memory storing program instructions that when executed by the processor, causes the processor to:
• monitor a sensor associated with an electro-mechanical part of the image forming device for an incident event;
• total a number of incident events monitored for a plurality of first time intervals;
• mark the total number of incident events monitored for each of the plurality of first time intervals as one of a first rate if the total number of incident events monitored exceeds a first threshold level or a second rate if the total number of incident events monitored is more than 0 but less than the first threshold level;
• cumulate a number of first time intervals with the second rate for a second time interval;
• and
• mark the component as needing to be one of repaired or serviced when the number of first time intervals with the second rate during the second time interval exceeds a second threshold level.