PMP Certification Planning Questions Test 2

During a company's relocation to a new data center, a project team member discovers that the new data center's power supply is insufficient. To support forecasted growth over the next three years, additional resources costing US$\mathrm{\$}$480,000 will be required.
Since the project manager previously identified this as a risk, what tool should have been used to determine if the contingency budget would adequately cover the costs?