Entry & Exit Criteria
The Test plan will consists of many important criteria’s to 
be fulfilled. One of the main topics is Entry & Exit 
Criteria. There could be many Entry and Exit criteria’s in 
a project. 

For Example

Entry Criteria -Business requirements is given to the test 
team for analysis

Exit Criteria- Test Estimation Signing off 

Entry Criteria – Application installed on UAT environment

Exit Criteria- No High severity/Priority defect open.

Reference:
http://www.sphur.com/?p=182

Entry criteria and exit criteria in testing life cycle ar 
as follows:

Entry criteria:
1)If all the test cases are prepared
2)Test environement is setup
3)Build is ready for further testing after sanity testing

Exit criteria:
1)All the test cases are executed and defects also fixed
2)If there are more no of defects with test cases failed
3)Test environment abonded suddenly
4)Dead lines reached
5)if the test period is over.