NOVELTY - The method involves designing an earth-boring tool by using a computer to generate a plot of performance parameters of the earth-boring tool as a function of drilling conditions, a set of values of depth of a cut variable and values of design variables, using generated plot, selecting the values of the design variables for incorporation into a model of the earth-boring tool (60) and generating the model of the earth-boring tool based on selected values of the design variables. The earth-boring tool is fabricated/formed (50) based on generated model of the earth-boring tool.    USE - Method for forming an earth-boring tool e.g. earth-boring rotary drill bit such as roller cone drill bit e.g. tri-cone bit, impregnated drill bit e.g. diamond impregnated drill bit and cubic boron nitride impregnated drill bit, fixed-cutter bit, hybrid bit and core bit, for drilling subterranean formations for oil and gas extraction applications and geothermal heat extraction applications. Can also be used for a rolling-cutter bit.    ADVANTAGE - The method enables designing the earth-boring tool by enhancing performance parameters of the earth-boring tool using the depth of cut values of the earth-boring tool in an efficient, cost-effective and accurate manner. The method enables a target torque curve that encourages the drill bit to experience forward synchronous rotation, while drilling a formation to avoid or minimize damage and wear to the drill bit.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating a method for designing and forming an earth-boring drill bit.    Step for defining drilling conditions (18)    Step for assigning values for design variables (20)    Step for calculating performance parameter based on drilling conditions (30)    Step for determining whether performance parameter is within acceptable range across a range of depth of cut values (40)    Step for forming earth-boring tool (50)    Step for selecting set of values of design variables for incorporating values into model of earth-boring tool (60)