I have a doubt abt Criteria in Testing

While preparing The Test Paln template we have Exit Criteria and Entry Criteria.What does it mean really?
(I thought taht the min. specifications for a perticular user to acess the menus or pages.Eg:-Admin had all the rights to visit all pages whr as the employee had no all rights to visit all the pages.Is't correct?????????????)
Plz i need it very urgent...........
any body can help me........


Thanx in Advance
Pushpalatha.a