You are managing a major system integration project in execution that depends on products and services delivered at various times by third-party vendors. What should the project manager do to help ensure successful execution?

The project is in execution, meaning vendor selection and contracting should have already occurred. Therefore, overseeing vendor selection or asking the procurement department to select vendors are actions that would have been taken earlier in the project lifecycle. Activating a mitigation plan for procurement risks is a reactive measure, taken only if a risk event occurs. While important, it's not a proactive step to ensure overall successful execution. Performing procurement control checks throughout the project is the correct answer because it involves actively monitoring contract performance, ensuring compliance with terms and conditions, and managing relationships with vendors. This ongoing oversight is crucial for ensuring that third-party products and services are delivered as expected, thereby supporting successful project execution.