The Public-private-partnerships (PPP) is becoming one of most preferred methods in procuring public infrastructures in Australia. While the PPP allows governments to transfer most risks to private firms, appropriate understanding of the risk related attributes and their impacts on overall project performance are quite crucial.

In this research, risks associated with the PPP procurement methods have been identified across three dimensions, time, cost and overall performance. A questionnaire survey approach was adopted for collecting data in major PPP projects in Melbourne.  Factor analysis was performed on the responses received from the respondents to identify the influencing factors and determine the degree of criticality of these factors.

The research found that site conditions and design complexity is one of the most critical attribute influencing time performance in projects. Similarly, market dynamics is found to be the most critical attribute influencing both cost and overall performance in PPP projects. 

The identification and quantification of the risk attributes that affect the project cost, time and overall performance acquaints construction practitioners with no or very less prior background in the PPP procurement methods to be more vigilant and enables to position efficiently within the competitive business environment.