The report has ben carried out by the following researchers:Report Author: Prof. Colin DuffieldResearch Team: Prof. Colin Duffield (Chief Investigator)Dr Peter RaisbeckMing XuFollowing I present the key findings of the study:Conclusion 1: The sixty seven projects analysed are representative of projects where government procures major Capital assets.Conclusion 2: There are sufficient data samples in the study upon which to draw conclusions with confidence.Conclusion 3: Over all time periods considered in this study, PPPs delivered projects for a price that is far closer to the expected cost than if the project was procured in the Traditional manner. Based on the inter-quartile percentage for the period from initial project announcement to the actual final cost, PPPs were 31.5% better than traditional projects.Conclusion 4: PPP contracts had an average cost escalation of 4.3% post contract execution compared to Traditional projects that had an average cost escalation of 18.0% for the same period. PPP projects provide far greater cost certainty than Traditional contracts and there is little variation in cost of a PPP project after the contract is signed.Conclusion 5: Australian Traditional projects have better cost performance than UK projects with 43.3% of Traditional Australian projects being completed within 5% of the expected cost compared with 27% of UK Traditional projects being completed within budget, refer NAO [4].Conclusion 6: Over the period from initial announcement of a project to when it is finally commissioned PPPs and Traditional projects are delivered with the same confidence in the likely overall time performance.Conclusion 7: During the period prior to project execution, PPP projects are frequently delayed (average 14.8%). However, once PPP projects reach financial close there was only, on average, a further 2.6% delay to these projects. This indicates that PPP contracts are well developed prior to release to market and changes after financial close are minimal.Conclusion 8: Predictions of the duration to reach commissioning are optimistic for Traditional projects with estimates of duration being on average 18.1% early at budget and 19.4% early at contract execution. An average delay of 25.9% occurs during the construction phase of Traditional contracts when compared to the actual final outcome. These delays may be due to: the initial optimism and/or required changes after contract signing to achieve Government's requirements, and/or due to uncertain contractual terms or risk allocation.This a another report provided by The Public-Private Infrastructure Advisory Facility (PPIAF).