Delaying Linked Tasks by Adding Lag Time

o Suppose you have a pair of tasks with a finish-to-start link. And then you realize that the suc-

t cessor really can't start when the predecessor is finished—there needs to be some additional

® delay. This is usually the case when something needs to happen between the two tasks that isn't another task. For example, suppose the "Order equipment" task is the predecessor to the "Install equipment" task. Although the equipment cannot be installed until after the equipment is ordered, it still cannot be installed immediately after ordering. Some lag time is needed to allow for the equipment to be shipped and delivered. In such a case, the successor needs to be delayed, and you can enter lag time in the schedule to accurately reflect this condition.

Just like lead time, lag time can be a percentage of the predecessor; for example, 75%. Or it can be a specific time period; for example, 16h or 3ed. Because it's adding rather than reducing time in the schedule, however, lag time is expressed as a positive number.

Note Don't confuse the delay afforded by lag time with assignment delay. With lag time, the delay is from the end of the predecessor to the beginning of the successor task. With assignment delay, there is a delay from the task start date to the assignment start date.

For more information about adjusting assignments using delay, see "Adjusting Assignments" on page 278.

To enter lag time for a linked task, follow these steps:

1 Display the Gantt Chart or other view with a task sheet.

2 Select the successor task that is to have the lag time.

3 On the Standard toolbar, click Task Information and then click the Predecessors tab.

4 In the Lag field for the existing Predecessor, type the amount of lag time you want for the successor. Use a positive number and enter the lag time as a percentage or duration amount.

Tip Enter lag time directly in the task sheet

You can also enter lag time values in the sheet portion of the Gantt chart. Click in the Pre decessors field of the successor task. The field should already contain the Task ID of the predecessor task. After the Task ID, enter the code representing the link type and then enter the amount of lag time; for example, 9FS+1 day, or 14FF+20%.

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