Abstract:Public Private Partnerships (PPP) are increasingly used for procuring Australian infrastructure projects. As with all construction projects, the early briefing stages are often the most crucial in determining a successful outcome. This is, however, a lack of systematic research on the type and nature of the critical factors affecting the effectiveness and efficiency of PPP during this period. A literature review is presented of PPP usage in Australia, in which four main categories of factors (procurement, stakeholder, risk, and finance) are identified, each with several subfactors. A questionnaire survey is also described involving state government stakeholders and a This is the Pre-Published Version. 2 mathematical model is developed which ranks the factor involved. This is followed by an examination of the potential of the factors to help improve the PPP briefing stage for both public and private sectors.