About lead and lag time

Lead time (lead time: An overlap between tasks that have a dependency. For example, if a task can start when its predecessor is half-finished, you can specify a finish-to-start dependency with a lead time of 50 percent for its successor [has a negative lag value].) is overlap between tasks (task: An activity that has a beginning and an end. Project plans are made up of tasks.) that have a dependency (task dependencies: A relationship between two linked tasks; linked by a dependency between their finish and start dates. There are four kinds of task dependencies: Finish-to-start [FS], Start-to-start [SS], Finish-to-finish [FF], and Start-to-finish [SF].). For example, if a task can start when its predecessor (predecessor: A task that must start or finish before another task can start or finish.) is half finished, you can specify a finish-to-start dependency with a lead time of 50 percent for the successor (successor: A task that cannot start or finish until another task starts or finishes.) task. You enter lead time as a negative value.

Lag time (lag time: A delay between tasks that have a dependency. For example, if you need a two-day delay between the finish of one task and the start of another, you can establish a finish-to-start dependency and specify a two-day lag time [has a positive value].) is a delay between tasks that have a dependency. For example, if you need a two-day delay between the finish of one task and the start of another, you can establish a finish-to-start dependency and specify two days of lag time. You enter lag time as a positive value.

You can enter lead time or lag time as a duration (duration: The total span of active working time that is required to complete a task. This is generally the amount of working time from the start to finish of a task, as defined by the project and resource calendar.) or as a percentage of the predecessor task duration. You enter lead time or lag time on the Predecessor tab in the Task Information dialog box.

 
 
Applies to:
Project 2003