Which of the following is NOT one of the 14 methods of control from ATP 3-09.30?

The correct answer is Target Size because it is not listed among the 14 methods of control as specified in ATP 3-09.30. The methods of control provide procedures for commanding artillery units during operations and emphasize the commander's intent and fire coordination.

Fire When Ready, At My Command, and Check Fire are all well-established methods of control used to manage artillery fire, allowing for strategic timing and safety during weapon deployment. Each of these methods serves a foundational purpose in ensuring effective communication and operational effectiveness within artillery units, whereas Target Size does not relate directly to the methods of control in this context.