PRINCE2 has 'event-driven' controls that are utilised at certain points, but also uses 'time-driven' controls that take the form of reports. Progress control is particularly effective if it is based on delivery.
This theme addresses the ongoing visability of the plans and explains the decision making process for approving plans, monitoring of performance and escalation process. This theme determines whether and how the project should proceed.
A common problem with progress control is that managers tend to do too much or too little.
