A PPP is less prone to "cost escalation". This is due to the fixed price nature of the contract and the greater care that the preparation of a "Public Sector Comparator" requires in estimating the full costs. "Cost escalation" in conventional procurement is likely to be due to a combination of initial cost underestimation and scope increases both before and after the contract is let. In addition, whole-of-life maintenance and operating costs are also made more transparent. These are often under-accounted for in conventional procurement.
PPPs are therefore likely to provide more cost certainty. Greater cost certainty is likely to result in better decision-making, as the decision-making will be based on more robust cost estimates.