Management is a central element in every company. In large companies, leadership is found on various levels. Management lays down company policy, makes business decisions and has little direct contact with the employees and their work. Supervisors serve as a link between management and the work groups or teams. They put directives into practice and are responsible for personnel planning in their respective areas. Team leaders are in direct contact with the workers and their work. Differing leadership approaches are needed in various job areas.