ve results though the work of himself and his subordinates, the manager must determine deadlines and then change or maintain the behavior of his employees to meet expectations. The only way a manager can manipulate behavior is to alter the environment in the present. A manager cannot feasibly determine what needs each employee desires for satisfaction, and cannot change organizational goals to fit the behavior of each individual employee. Since all practices of managers involve the manipulation of the work environment, it is only natural that that is the way to affect motivation. ...