Patent ID: 7679764

Claim:
A method of managing a printing device via a network, wherein the network connects a printing device and a management system that manages the printing device, the method comprising at the printing device side: sending information relating to the usage status of the printing device to the management system from the printing device; detecting a predetermined operation on the printing device; notifying the management system of a specified notification that includes printing device identification information when the predetermined operation is detected, wherein the printing device identification information is information to identify the printing device; the method comprising at the management system side: storing the information sent from the printing device to an information storage unit; extracting information relating to the printing device from the stored information based on the printing device identification information, creating a failure inference information based on the extracted information, wherein the failure inference information indicates a deterioration of printing quality of the printing device, creating reply information including the failure inference information in relation to the specified notification based on the extracted information, and sending the reply information to a specified transmission destination.