FIELD PERSONNEL = Location + Performance + Actual Hours of Work

The definition of a "field personnel" is not merely concerned with the location where the employee regularly performs his duties but also with the fact that the employee's performance is unsupervised by the employer. We held that field personnel are those who regularly perform their duties away from the principal place of business of the employer and whose actual hours of work in the field cannot be determined with reasonable certainty. Thus, in order to determine whether an employee is a field employee, it is also necessary to ascertain if actual hours of work in the field can be determined with reasonable certainty by the employer. In so doing, an inquiry must be made as to whether or not the employee's time and performance are constantly supervised by the employer. (G.R. No. 162813, February 12, 2007)