The new frontiers of New Public Management (NPM) identified in the processes of e-government the new tools to provide efficiency, effectiveness and economy to the Public Sector.

In this scenario Public Institutions have shown a continuing and growing need to develop systems of multidimensional measurement of their performances.

The research – with reference the Italian context – lies in the complex area of the performance measurement applied to the Public Institutions and aim and scope of the paper is to demonstrate how the quality of websites (analysed under the aspects concerning the technological level and the administrative transparency) can also be considered a valid support to improve the quality of service provided online by the Public Sector.