Final answer:
The audits, housing inspections, and interviews with contract employees to actively look for indicators of human trafficking would be used in the implementation phase of the contract.
Step-by-step explanation:
When overseeing a contract to build a new recreation center on a United States military installation in Germany, the phase of the contract where audits, housing inspections, and interviews with the contract employees would be used to actively look for indicators of human trafficking is the implementation phase.
This is the phase in which the project plan is executed, and it involves working closely with the contract employees to ensure that all aspects of the project are being carried out as planned.
During this phase, audits and inspections can be conducted to verify that the work being done aligns with the contract requirements and specifications. Interviews with contract employees can also be conducted to gather additional information and insights about their experiences and any potential red flags that may indicate human trafficking.
By actively monitoring and assessing the work being done and engaging with the contract employees, the defense acquisition professional can identify any indicators of human trafficking and take appropriate actions to address the issue.