When you start a federal or state job, you are on "probation" for one year. If you pass all three evaluations given at months 3, 6, and 11 then you deemed to have passed probation. The main difference being how they can fire you. Probationary employees can't be fired on a whim. You still have to have a reason tied to job performance. Nonprobationary employees, you had better have a rock solid case.. videos, screen shots, time card data, audio, etc. whereas the opposite, you can just say that you did not get enough points on an evaluation and so that is all.