Primavera P6: Cannot change Remaining Duration of an Activity

Problem When we change the Remaining duration of an activity, it keeps reverting to the original value. Change the Remaining Duration value of an activity Reason & Solution There could be two reasons of this problem: 1. There is an "Expected Finish" constraint on the activity. When using an Expected Finish constraint, the remaining duration... Continue Reading →

Primavera P6 Constraint: How does it work?

1. Purpose of Constraints in Primavera P6 Date restrictions used to reflect project requirements that cannot be built into the network logic.More accurately reflect real-world aspects of a project.Provide added control of a project.Apply to the entire project or to individual activities.Commonly used project-level constraint: Must Finish ByCommonly used activity-level constraint: Start On or AfterNo... Continue Reading →

How does Primavera P6 determine a driving relationship between activities?

The Driving Relationship is determined based on the Relationship Free Float and the business rules for Driving Relationships. Relationship Free Float Relationship Free Float (Rel FF): The Free Float on the relationship. Calculated as Successor Early Start (assuming a Finish to Start relationship) - Relationship Early Finish on the predecessors' calendar. This field is computed... Continue Reading →

What is the difference between Activity type: Task Dependent and Resource Dependent in Primavera P6

In Primavera P6, there are 2 popular activity types: Task Dependent and Resource Dependent. What is the difference between these types? By choosing the activity type, P6 will select what calendar is used to calculate the finish date of the activity: Choose Task Dependent: P6 use Activity calendarChoose Resource Dependent: P6 use Resource calendar It will affect... Continue Reading →

Create a website or blog at

Up ↑