Assigning resources to tasks
Most tasks require some kind of resources in order to complete. Software development needs programmers, excavation needs heavy machinery, and construction needs lumber. Tracking which resources are assigned to which tasks helps you to see how long the tasks will take to complete, and when your resources are going to be busy or idle.
There are several ways to assign a resource to a task:
Select the task in task view, open the Task Assignments inspector 
, and check the resources you'd like to assign. You can then edit the amount to assign, if it's different from the default amount. You can also see all of a resource's assignments, and adjust their amounts or clear them, in the Resource Assignments inspector 
.
, and check the resources you'd like to assign. You can then edit the amount to assign, if it's different from the default amount. You can also see all of a resource's assignments, and adjust their amounts or clear them, in the Resource Assignments inspector . Edit the Assigned column of the task outline, or the assigned resources area in the Gantt chart, like so:
Enter resource names in the Assigned column to assign them to the task. 
You can also double-click resource lists in the Gantt chart and edit them directly there. 
Follow a staff resource with a percentage inside curly braces to assign an amount other than 100%. 
Follow a material or equipment resource name with a number in curly braces to assign an amount other than 1 unit. 
Separate multiple resource names with semicolons. Drag tasks around between resources' lanes and the Unassigned lane in the resource timeline chart. While dragging a task from one resource to another, you can hold the Option key to assign the task to the second resource without unassigning it from the first.
Drag a card from Address Book to a task in the task view. If the project doesn't yet have a resource associated with that card, a new one is added.