Method comprising the steps of: providing a system (1-3) in an earth moving machine, the system (1-3) comprising: a plurality of wear elements (10-15) adapted for coupling with a blade of digging implements of an earth moving machine ; and one or more sensors for measuring forces, each sensor of the one or more sensors being arranged in one wear element of the plurality of wear elements (10-15) or between two wear elements of the plurality of wear elements (10-15); measuring strains or unitary deformations with the one or more sensors ; processing the measurements of the one or more sensors with central control means so as to calculate forces based on the measurements; and characterized by determining (440a-440c), the central control means , an action to be performed based on the calculated forces so that: when the calculated forces exceed a predetermined excessive force threshold, the action is at least one of: emitting a warning in the form of at least one perceptible signal, and reducing a breakout force of the machine in an automatic manner; and when the calculated forces are less than a predetermined optimal force threshold, the action is at least one of: emitting a warning in the form of at least one perceptible signal, and increasing the breakout force in an automatic manner. providing a system (1-3) in an earth moving machine, the system (1-3) comprising: a plurality of wear elements (10-15) adapted for coupling with a blade of digging implements of an earth moving machine ; and one or more sensors for measuring forces, each sensor of the one or more sensors being arranged in one wear element of the plurality of wear elements (10-15) or between two wear elements of the plurality of wear elements (10-15); a plurality of wear elements (10-15) adapted for coupling with a blade of digging implements of an earth moving machine ; and one or more sensors for measuring forces, each sensor of the one or more sensors being arranged in one wear element of the plurality of wear elements (10-15) or between two wear elements of the plurality of wear elements (10-15); measuring strains or unitary deformations with the one or more sensors ; processing the measurements of the one or more sensors with central control means so as to calculate forces based on the measurements; and characterized by determining (440a-440c), the central control means , an action to be performed based on the calculated forces so that: when the calculated forces exceed a predetermined excessive force threshold, the action is at least one of: emitting a warning in the form of at least one perceptible signal, and reducing a breakout force of the machine in an automatic manner; and when the calculated forces are less than a predetermined optimal force threshold, the action is at least one of: emitting a warning in the form of at least one perceptible signal, and increasing the breakout force in an automatic manner. when the calculated forces exceed a predetermined excessive force threshold, the action is at least one of: emitting a warning in the form of at least one perceptible signal, and reducing a breakout force of the machine in an automatic manner; and when the calculated forces are less than a predetermined optimal force threshold, the action is at least one of: emitting a warning in the form of at least one perceptible signal, and increasing the breakout force in an automatic manner. <EOS>