The Task Status Configuration allows you to choose when a task is available to work on (PMs only), is considered late, and is considered critically overdue. This is calculated by the number of days below the scheduled date. The number set in the green will determine how soon an alert is sent before a Task is due. 

The Task Status Configuration can be found under the Task Settings. 

The number you type into the green box is the number of days this Task will trigger before its initial start date. If you type "10" into the green box, and the Task is scheduled to open November 18th, then the Task will open November 8th. 

The orange box indicates the number of days it will take a Task to be considered late after the due date. By default, the value is set to "-1". This means one day after the initial start date, the task will turn orange. If you typed a "-3" into this box, then the Task will turn orange 3 days after the due date.

The red box indicates the number of days it will take a Task to be considered critically overdue. The default setting is "-2". This means if the task is not completed two days after the task start date, it will turn red. If you type "-7" into this box, then the Task will turn red 7 days after the initial due date.

In the Manage Work screen, you can see the number of days a task is away from its due date along with the corresponding Task Status color.