PDM Network Relationships
The activities in a PDM network diagram have one of three types of precedence relationships:
Click each button to read a description of that type of relationship.
Finish-to-Finish Relationships
In an FF relationship, the predecessor activity must be completed at the same time as the successor activity is scheduled to finish. You might need to know how to build FF relationships if your sponsor is operating on a just-in-time basis or if you have no warehousing capabilities.
FF relationships are important when two tasks must finish at the same time;
for example: