In this respect, managers play a central role in the changing process: they should not be too dependent on top management directions but they must drive changes and get commitment from the employees to continuous improvement. According to Mintzberg (1995) no job is more vital to our society than that of the manager. Mintzberg (1995) and Senge (1995) define manager as a professional who deals with information and communication. According to those authors, decision making under risky conditions is the essence of the task of managers. Mintzberg has studied managerial work, concerning characteristics and content of the work and concluded that the classical definition of manager as the professional who deals with planning, co-ordination and controlling is a mistake. He thinks that it is important to recognize this mistake so as to be effective on management education.