Precedence Relationships The logical relationship between two activities

Precedence Relationships The logical relationship between two activities that describes the sequence in which the activities should be carried out. Relationship Description Finish-to-start (FS) Activity A must finish before activity B can start. Finish-to-finish (FF) Activity A must finish before activity B can finish. Start-to-start (SS) Activity A must start before activity B can start. Start-to-finish (SF) Activity A must start before activity B can finish. Copyright © 2008 Element K Content LLC. All rights reserved. OV 4 - 1

Lag A delay in the start of a successor activity. FS relationship with lag

Lead A change in a logical relationship that allows the successor activity to start before the predecessor activity ends in an FS relationship. A 8 days B 6 days FS-4 A (8 days) 4 days B (6 days) 10 days Copyright © 2008 Element K Content LLC. All rights reserved. OV 4 - 3

Project Schedule Network Diagram A graphical representation of the sequence of project activities and

Arrow Diagramming Method Activity Predecessors A B A C B, F D C, G

Precedence Diagramming Method Produces a project schedule network diagram that uses rectangular boxes, or nodes, to represent activities and arrows to represent precedence relationships between activities. Copyright © 2008 Element K Content LLC. All rights reserved. OV 4 - 6

Summary Activities A group of related schedule activities that, for reporting purposes, is shown as a single aggregate activity in a bar chart or graph. Copyright © 2008 Element K Content LLC. All rights reserved. OV 4 - 7

Conditional Diagramming Method Any network diagramming method that allows for nonsequential activities. such as loops or conditional branches. GERT network diagram with conditional branch GERT network diagram with loops Copyright © 2008 Element K Content LLC. All rights reserved. OV 4 - 8