Indicating whether a task is an effort-driven task

An effort-driven task is one where the total amount of work required to complete the task is directly affected by the number of resources that have been assigned to it.

To indicate that a task is an effort-driven task

Open the Projects module.
Select an item.
Select the Task Plan tab.
Select a task in the task plan.
Open the Task Information dialog box.
Select the Advanced tab.
Select Ignore Resource Calendar.
Click Effort Driven.