Meaning of task dependency relationships and when tasks with these relationships are considered delayed

These are the four types of relationship a task on a project plan can have with its predecessor(s) and what they mean:

  • End to Start (ES): Predecessor task should End (+ or - the specified lag time) before the Dependent task Starts
  • End to End (EE): Predecessor task should End (+ or - the specified lag time) before the Dependent task Ends
  • Start to Start (SS): Predecessor task should Start (+ or - the specified lag time) before the Dependent task Starts
  • Start to End (SE): Predecessor task should Start (+ or - the specified lag time) before the Dependent task Ends

Tasks with these relationships will be considered delayed under the following circumstances for each respective relationship:

  • ES: The Dependent task will be considered Delayed if the Dependent task should have started, but the Predecessor is not yet complete.
  • EE: The Dependent task will be considered Delayed if the Dependent task should have ended today or before, but the Predecessor is not yet complete.
  • SS: The Dependent task will be considered Delayed if the Dependent task should have started, but the Predecessor is delayed.
  • SE: The Dependent task will be considered Delayed if the Dependent task should have ended, but the Predecessor is delayed.

Details

Article ID: 42109
Created
Tue 11/7/17 12:52 PM
Modified
Mon 6/29/20 5:32 PM