A control device may obtain, at each of a plurality of sets of date-and-time, a current value related to a current remaining amount of a print material used by the print performing unit. The control device may calculate N1 change values by using a plurality of current values obtained at the plurality of sets of date-and-time, each change value being related to a change per unit time of a remaining amount of the print material. The control device may specify a first greatest change value among the N1 change values. The control device may perform a first prediction process that includes calculating a first future value by using the first greatest change value, the first future value being related to a future remaining amount of the print material, and a first output process using the first future value in a case where the first prediction process is performed.

Example systems and methods may relate to controlling a printing device. Specifically, systems may include a processing device and a printing device. The processing device may be configured to determine an image corresponding to a command for performing maintenance on a printing device. Such a command may include a command to restart device, clean memory, or set sleep mode, for example. The processing device may also render the image on a portable medium. The printing device may read the image using a scanner or other reading device. The printing device may then determine that a command corresponds to the image read. The printing device may then execute the command that corresponds to the image read.

A printing apparatus operating in a service mode is reactivated when the printing apparatus receives a reactivation instruction from an external device connected to the printing apparatus by a direct wireless communication function. The reactivated printing apparatus starts an operation in the service mode instead of a normal operation mode.

An apparatus is configured to obtain operating information related to an operation amount of an image forming apparatus through the communication circuit, obtain another operating information related to another operation amount of another image forming apparatus located in a same installation location at which the image forming apparatus is located, determine, based on the operating information and the another operating information, a replacement timing for replacing a consumable component used in the image forming apparatus, and output the replacement timing.

An image forming system includes an image forming apparatus and a first storage unit that stores registree information of users registered to work on the image forming apparatus. The image forming apparatus includes a processor programmed to determine whether or not work needs to be performed on the image forming apparatus by a worker based on a predetermined condition, obtain presence information of a registree from a second storage unit, the presence information indicating the presence state of the registree, identify one or more registrees associated with the work to be done, in a case where work needs to be done on the image forming apparatus by a worker, and upon determining that one or more registrees is present, perform a notification process that notifies one of the present registrees that work needs to be done on the image forming apparatus.

An information processing apparatus which communicates with an image forming apparatus that forms an image on a sheet, the information processing apparatus includes: an acquisition unit configured to acquire error information about an error that has occurred in the image forming apparatus, and maintenance information about maintenance work performed on the image forming apparatus; a memory configured to store a plurality of pieces of error information acquired by the acquisition unit; and a controller. The controller is configured to: determine, from the plurality of pieces of error information stored in the memory, based on the maintenance information, first error information about an error that has occurred during the maintenance work; and determine an error part of the image forming apparatus based on second error information obtained by excluding the first error information from the plurality of pieces of error information stored in the memory.

Method of providing a user interface in a display device for remote management of grouped plurality of devices. The method includes: receiving a first selection for selecting one group of a plurality of groups of devices; receiving a second selection for selecting one item of a plurality of items related to each of the plurality of groups; displaying a management screen for the selected item related to the selected group in response to a selection of the group while keeping the item selected before the selection of the group, the management screen being used for management of the selected item related to the selected group; and displaying the management screen for the selected item related to the selected group in response to a selection of the item while keeping the group selected before the selection of the item.

An image forming apparatus includes an electrophotographic process assembly, a processor, and a memory. The electrophotographic process assembly is configured to transfer a toner image formed on a photoconductive body rotating around an axis extending in a main scanning direction onto a sheet conveyed in a sub-scanning direction orthogonal to the main scanning direction. The processor and memory are configured to store a print amount in a plurality of divided sections corresponding to the main scanning direction, acquire the print amount from a monitoring section in one or more monitoring target groupings corresponding to a predetermined section included in the plurality of divided sections, calculate an integrated print amount in the monitoring section, and output information relating to the monitoring target grouping corresponding to the integrated print amount in the monitoring section.

The location of a printing device is determined. Environmental conditions in which the printing device operated when printing a print job are determined based on the determined location. An environmental adjustment factor for the printing device is determined based on the determined environmental conditions. A predicted print material usage of the printing device in printing the print job is adjusted based on the determined environmental adjustment factor.

A printing apparatus is provided. A mount unit is able to mount a consumable. A communication unit is able to communicate with a server system. A request unit requests, to the server system via the communication unit, service-related information related to the consumable. A reception unit receives, via the communication unit, the service-related information transmitted from the server system with respect to the request. A determination unit determines, in a case in which a state of the communication unit has shifted from a first state in which communication with the server system is disabled to a second state in which communication with the server system is enabled, whether a request for the service-related information by the request unit is required, based on a reception history of the service-related information of the reception unit.