In the last decades, the traditional administration has been subjected to some challenges caused by ample changes, worldwide, in the managerial, political, judicial field, against the globalization and diversification of services. The changes were based on principles of the New Public Management and meant the achievement of a managerial reform in the methods of operating of public sector organizations, by moving from the traditional model of public administration, governed by the bureaucratic

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... eory of Max Weber, towards a flexible model. of public management; it was pursued to reduce the differences besides the private sector. The new concept appeared against the background of finding the inefficiency of the public administration system, in the use of public resources and focuses on the takeover in the public sector, of the management techniques, belonging to the private sector. The paper aims to present the reform process covered by the traditional public administration, begining with the end of the last century, generated by the emergence of the new managerial formula. There are presented concepts and definitions in evolution, but also, levels of conceptualization of the new current, as reflected in the theories and works of specialists.