Final answer:
The Monitoring and Controlling process group is mandatory throughout the project to ensure completion in a controlled manner.
Step-by-step explanation:
The project management process group that becomes mandatory throughout the project to make sure that the project is driven to completion in a controlled manner is the Monitoring and Controlling process group.
The Monitoring and Controlling process group involves tracking the progress of the project, monitoring project activities, and taking corrective actions if necessary. It ensures that the project is on track and meeting its goals and objectives. This process group is important for keeping the project on schedule, within budget, and meeting quality standards.
Throughout the project, regular monitoring and controlling activities such as performance measurement, project status updates, risk analysis, and change control are conducted to ensure the project stays on track.