Predecessor Activity
A task that must occur before another, dependent task in the project schedule.
Key Points
- Defines the logical order of tasks and establishes dependencies between activities.
- Can be linked with different relationship types (FS, SS, FF, SF) along with leads or lags.
- An activity may have multiple predecessors, a single predecessor, or none at project start.
- Predecessor and successor relationships influence the critical path and schedule flexibility.
Example
In a building project, "Complete foundation" must finish before "Start framing" can begin. "Complete foundation" is the predecessor activity; "Start framing" is its successor.
PMP Example Question
Which statement best describes a predecessor activity?
- A task that starts only after its successor finishes.
- A task that must occur before a dependent task in the schedule.
- A task that is not linked to any other activity.
- A task that represents the longest path through the schedule network.
Correct Answer: B — a task that must occur before a dependent task
Explanation: A predecessor activity is one that logically comes before another activity that depends on it.