 The most studied types are mentors and protégés, supervisors and subordinates, or even applicants and recruiters.Research has shown that person–supervisor fit is most strongly related to supervisor-oriented outcomes like supervisor satisfaction (Boone & Hartog, 2011).Training and development on the job can be used to update or enhance skills or knowledge so employees are more in tune with the requirements and demands of their jobs, or to prepare them to make the transition into new ones.