Adding Lag with Predecessor in Lead Gantt

Lag is the number of days you want to delay starting a task. Let’s say, you want Task 3 to start after a lag of 3 days. Now, remember we have a predecessor for Task 3 which is Task 1. Task 1 is completing on 28-Dec-2020, so after adding the 3 days lag, the start date for Task 3 will be calculated as 4-Jan-2021, excluding Jan 1 holiday and Saturday and Sunday. And since the WD for Task 3 is 1, the end date will also be 4-Jan-2021.

To add a lag:

1. Enter 3, under the Lag column, in the row of Task 3.

The start and end dates for Task 3 will be calculated as 4-Jan-2021 and displayed.

Lag column

You can leave certain rows blank in a section without adding any task. The start date for the next task will be calculated based on the end date of the previous task.

2. Delete all the details of Task 4 and Task 5.

Deleting Task 4 and Task 5

3. Now, for Task 6 enter WD as 6.

The start and end dates for Task 6 will be calculated as 5-Jan-2021 and 12-Jan-2021 respectively. This is because the end date of Task 3 - 4-Jan-2021 plus 6 WD for Task 6 will be 12-Jan-2021, excluding Saturday and Sunday.

WorkDays as 6

Similarly, you can leave certain rows blank in a section and continue to add task details in the following section, the start and end dates for the first task. in the following section, will be calculated based on the end date of the last task in the previous section. 

4. In Section 2, let’s enter the WD for Task 2.1.

The start and end dates for Task 2.1 will be calculated as 13-Jan-2021 and 15-Jan-2021 respectively. This calculation is based on the fact that the end date for the last task in Section 1, Task 8 is 12-Jan-2021. This plus 3 WD, the start and end dates will be 12 and 15 Jan respectively.

Section 2
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