The growing importance of information technology (IT) as a strategic factor for organisations in achieving their objectives, have raised the concern of organisations in establishing and implementing effective IT governance. The phenomenon is not only happened in private sectors but also in public sectors. This study attempts to examine empirically the individual IT governance mechanisms that influence the overall effectiveness of IT governance in public sectors.

Obtaining the sample data by using web based survey from 54 members of ISACA (Information Systems and Audit Control Association) currently working in Australian public sector organizations; this study examined the influences of four proposed IT governance mechanisms on the overall effectiveness of IT governance. Using Factor analysis and multiple regression techniques, this study found significant positive relationships between the overall level of effective IT governance and the following two IT governance mechanisms: the existence of an IT strategy committee and corporate (organization) communication systems.