The paper presents an approach to evaluation the impact of the level of development of institutional environment on the success of the reforms of public administration. The indicators that characterize the degree of development of the institutional environment, in particular, the level of protection of property rights, the development of political competition, civil society, corruption, and trust in society are shown. Depending on the elements of the political-administrative system, socio-economic features, that determine the trajectories of reforms, showing alternative purposes and characterized some indicators, that characterizing the results of reforms for the OECD-counties. Showing institutional problems is implementing reforms in the transition countries, depending on the elements of the political and administrative systems, and socio-cultural factors that determine the path of reform, showing alternative purposes and characterized by individual indicators characterizing the results of the OECD reform. From the point of view of the classification results, the emphasis is made on quantitative results of the operational type, in particular, the dynamics of the general government expenditure and the level of employment of civil servants in relation to employment in the economy as a whole. Showing institutional problems in the implementation of reforms in the transition countries, in particular the gap of development of the bureaucratic ethos, the weakness of the market environment and the insufficient level of external pressure on the quality of public services. The significance for the success of reform and systemic cultural change within the state apparatus, which affects the quality of citizens' satisfaction with public services is observed. It is noted that the preliminary formalization of the public sector, the formation of Weberian bureaucracy type is essential for successful implementation of the New Public Management. The factors that determine the choice country-shaped governance model are underlined. Proposed as determinants of the choice of the level of development of "soft infrastructure" on the one hand and the availability of the resource and institutional capacity to improve the efficiency and quality of public administration on the other. As potential outcomes ideal models of states (lean, producing, coordinating) and designated conditions for state and society failure (fragile state) are considered.