1. A method of monitoring a technician's performance of a marking operation to indicate the presence or absence of an underground facility, wherein the technician uses a marking device, the method comprising: A) receiving operating information representative of motion of the marking device during performance of the marking operation by the technician, wherein the operating information is representative of at least one of: an acceleration of the marking device; a velocity of the marking device; a distance traveled by the marking device while performing at least one task associated with the marking operation; and an angle of inclination of the marking device; and B) analyzing, using at least one processor, the operating information to determine a pattern of motion.