Definition
The Precedence Diagramming Method (PDM) is a visual project scheduling tool that illustrates the sequence of activities in a project. It helps in understanding dependencies between tasks.
Types of Task Dependencies in PDM
- Finish-to-Start (FS) – Task B starts only after Task A finishes.
- Start-to-Start (SS) – Task B starts when Task A starts.
- Finish-to-Finish (FF) – Task B finishes only after Task A finishes.
- Start-to-Finish (SF) – Task B finishes only after Task A starts (rare).
Benefits of PDM
✔ Provides a clear roadmap for project execution.
✔ Helps in identifying critical paths for scheduling.
✔ Ensures team members understand task relationships.