Maintain Difficulty To Fill
When ever you try to create a Job Profile, or a Position or a Job Requisition you get to see a field called Difficulty to Fill where you may need to pick one of the values populated. Every organization have a different meaning for "Difficult" or "Easy" or "Hard" , you could set this up in the task to configure any additional items if you need.
From Create Position task
From Create Job Profile task
Here is the task where you can add any of the required new listings. Also notice the number of usage of these items in job profiles.