Theory "X &Y" are created by "Douglas McGregor", and theory" Z" is created by " William Quchi"
Theory "X": assumes that workers are usually lazy, little ambition, and are motivated by coercion and threats, therefore manager uses fear and strict discipline to make sure his employees get done what needs to be done, and it may cause stress to the employees in addition not give them the chance to take any initiatives.
Theory"Y": assumes workers are motivated by an internal needs to excel and actively pursue responsibilities, as manager trust his employees to get what needs to done, but it can promote the non informal environment
Theory "Z" it is an approach to manage a large society , assumes workers are the key increase of productivity as the values of certain cultures affect the way the employees are worked and they can to trusted to do their jobs to their most ability, but in case the employees can not trust the manager or the manager can not trust the employees, this theory becomes non existent.
-Ashraf E. Mahmoud (PhD)
