Except as limited by special laws, an employer is free to regulate, according to his own discretion and judgment, all aspects of employment, including hiring, work assignments, working methods, time, place and manner of work, tools to be used, processes to be followed, supervision of workers, working regulations, transfer of employees, work supervision, lay-off of workers and the discipline, dismissal and recall of work. (Philippine Span Asia v. Pelayo G.R. No. 212003 February 28, 2018)