Add Duration to a Task on the Task List Page

Add duration to a task to specify the amount of time the task will take to complete. After adding a duration and due date, your tasks will display on the Gantt chart according to their sequence. You can view specific details about task duration by hovering over the task on the Gantt chart. Because task milestones indicate the beginning or end of a phase in your project, they do not have duration.

To add duration to a task on the Task list page:

In the object selector, select a project or program.
In the sidebar, hover over  Tasks, and select Task List.
In the table, select the task.
In the Duration column, enter a value for the duration of the task.
Note: The value of the entered duration must be in whole days greater than zero.
All changes made to this page are saved automatically.

Tips

If a task is part of a hand-off chain, changing its due date directly, accepting a proposed due date, or setting a new committed due date will cause the task and other tasks in the chain to be moved. The current hand-off mode determines the movement of a hand-off chain when any of the tasks in the chain are modified:
-  Keep Hand-offs: Maintain hand-off logic, but allow for the addition or consumption of slack between tasks.
-  Break Hand-offs: Only maintain hand-off logic until the slack between two tasks reaches zero.

Next: Add a Due Date to a Task on the Task List Page