Delivery management system, delivery management apparatus, and image forming apparatus

A delivery management apparatus comprising:

• a processor that:
• acquires information on a consumption state of consumables used in each of image forming apparatuses that executes at least one of:
• changing a consumption amount of toner as the consumables by changing a fog margin in each of the image forming apparatuses, based on a received adjustment setting;
• and
• changing a consumption amount of black toner as the consumables by increasing the consumption amount of toner of other colors for image formation other than the black toner, based on the received adjustment setting,
• determines a same timing of delivery of the consumables to the image forming apparatuses, based on the information on the consumption state of the consumables,
• generates an adjustment setting for the consumption amount of the consumables, for each of the image forming apparatuses, based on the same timing of delivery, and
• transmits, to each of the image forming apparatuses, the adjustment setting for each of the image forming apparatuses.

An image forming apparatus comprising:

• a communication interface that communicates with a delivery management apparatus;
• and
• a controller that adjusts a usage amount of consumables, wherein
• the communication interface:
• transmits information on a consumption state of the consumables to the delivery management apparatus, and
• receives, from the delivery management apparatus, an adjustment setting for a consumption amount of the consumables determined based on a same timing of delivery among the image forming apparatus and one or more other image forming apparatuses, and
• the controller executes at least one of:
• changing the consumption amount of toner as the consumables by changing a fog margin in the image forming apparatus, based on the received adjustment setting;
• and
• changing the consumption amount of black toner as the consumables by increasing the consumption amount of toner of other colors for image formation other than the black toner, based on the received adjustment setting.