Planning Using Primavera Project Planner P3 Version 3.1 Revised 2006

You have now completed the plan or have completed sufficient iterations to have an acceptable plan and the project is progressing. The important phase of regular monitoring begins. Monitoring is important to help catch problems as early as possible, and thus to help minimize the impact of the problem on the successful completion of the project.
P3 uses an entire schedule as the target. Therefore the schedule is copied into the same subdirectory with a different name, before a project is statused for the first time. It is then selected as the Target.
To monitor progress, the actual progress is recorded and entered into the schedule and the schedule is calculated. This process is known as statusing, progressing or updating a schedule. The progressed schedule is compared to the Target to identify where the project is behind or ahead of plan.
Two target schedules may be linked to the project you are working on at any time. This is useful for comparing the current schedule with the target and the last period schedule at the same time, thus enabling you to see the variance from the target and last periods in the same View. The target schedules may be changed at any time.
The main steps for monitoring progress are:
Copying an unprogressed schedule as the Target Schedule
Assigning the Target project(s) to the schedule
Recording or Marking up progress
Updating the schedule
Calculating the schedule and
Comparing and reporting actual progress against planned progress and revising the schedule...