Likert’s management systems are management styles developed by Rensis Likert in the 1960s. He outlined four systems of management to describe the relationship, involvement, and roles of managers and subordinates in industrial settings. He based the systems on studies of highly productive supervisors and their team members of an American Insurance Company. Later, he and Jane G. Likert revised the systems to apply to educational settings. They initially intended to spell out the roles of principals, students, and teachers; eventually others such as superintendents, administrators, and parents were included.