Importantly, within the project budget there are budget lines for risks and contingencies. In this case, the project budget authority was $8.6 million. The project was delivered at $8.04 million, but included in that $8 million of the projected budget was about $1 million in contingencies and risks.
What you hope is that you don't have to spend all of those contingencies and risks, but because you don't know the outcome of the consequence of many of these tenders—it's ultimately the market that determines what the cost of these construction disciplines will be—you need contingencies. Often a project budget is an estimate. It's your best guess as to what those numbers will be.