Management system, management apparatus, and management method

A management apparatus, comprising:

• a processor;
• and
• a memory that stores instructions, that in response to execution by the processor, perform operations, comprising:
• generating first information indicating that forming an image on a sheet is executed;
• generating second information indicating that decolorizing the image formed on the sheet is executed;
• storing the first information and the second information;
• determining whether or not the decolorizing the image formed on the sheet is executed on the sheet by a predetermined time point based on the first information and the second information;
• and
• determining whether or not the decolorizing the image formed on the sheet is executed on all the sheets until either one or both of the predetermined time point and a time point before the predetermined time point after the first information is acquired.

A management method, comprising:

• generating, by a device comprising a processor, first information indicating that forming an image on a sheet is executed;
• generating, by the device, second information indicating that decolorizing the image formed on the sheet is executed;
• storing the first information and the second information;
• determining, by the device, whether or not the decolorizing the image formed on the sheet is executed by a predetermined time point based on the first information and the second information;
• and
• determining, by the device, whether or not the decolorizing the image formed on the sheet is executed on all the sheets until either one or both of the predetermined time point and a time point before the predetermined time point after the first information is acquired.