Non-transitory computer-readable recording medium for control device and control device

A control device comprising:

• a processor;
• and
• a memory configured to store computer-readable instructions therein, the computer-readable instructions, when executed by the processor, causing the control device to perform:
• obtaining, 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;
• calculating N1 (N1 being an integer equal to or greater than 2) 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 in a remaining amount of the print material;
• specifying a first greatest change value indicating that the change per unit time is the greatest among the N1 change values;
• and
• 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.

A non-transitory computer-readable recording medium storing computer-readable instructions for a control device configured to perform a process related to a print performing unit,

• the computer-readable instructions, when executed by a processor of the control device, causing the control device to execute:
• obtaining, 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;
• a first prediction process that includes calculating a first future value by using a plurality of current values obtained at the plurality of sets of date-and-time, in a case where a latest current value obtained at the latest date-and-time among the plurality of current values indicates that a remaining amount of the print material is equal to or less than a reference value, the first future value being related to a future remaining amount of the print material;
• a first output process for outputting information at least based on the first future value in a case where the latest current value indicates that the remaining amount of the print material is equal to or less than the reference value and the first prediction process is executed, wherein the first output process is not executed in a case where the latest current value indicates that the remaining amount of the print material is more than the reference value.