Primavera P6: Summarize/Roll up activity duration at WBS level using duration value, not earliest and latest date

By default, Primavera P6 summarizes activity duration at the WBS (Work Breakdown Structure) level by calculating the time span from the earliest Start Date to the latest Finish Date of all activities within that WBS. However, if you prefer to calculate the summary duration by summing the individual durations of all activities, follow these steps:

Step 1: Create a User Defined Field (UDF)

1. Navigate to Enterprise → User Defined Fields.
2. Create a new field, for example, “TotalDuration(SimplyPlus)”.
3. Set the Data Type to Integer.

This field will store the summed duration for each activity.

Step 2: Create a Global Change

1. Go to Tools → Global Change.
2. Create a new Global Change, e.g., “AssignValueToTotalDuration(SimplyPlus)”.
3. Define the formula to assign each activity’s original duration to the new UDF field. (Refer to the image for the exact formula setup.)

Step 3: Run the Global Change

1. Execute the newly created Global Change.
2. Primavera P6 will populate the TotalDuration(SimplyPlus) field for each activity.

Step 4: View the Summed Duration at the WBS Level

Now, in addition to the default summary duration, you can view the summed duration based on the new UDF.