The entry criteria means when we will start to test a 
module or build. we need some pre requirements:

1) Test cases should be ready
2) Test environment 
3) Stable build

entry criteria - 1. unit test will completed
2. test plan will completed 
3. Test case will completed and take the Approval to the tl
or pm
4.Stable build

software requirment specification
project managment plan
templets

ETVX is the entry criteria for testing

(Entry Task Validation Exit) is the expansion for ETVX

1.Test Plan
2.Test Bed
3.Test Case
&  a Fresh Mood ...

QA team needs to take the following steps before starting 
testing of a product or its part-

1) Approval from developers that system is ready to test 
from as they have done with unit testing.
2) Test plan and cases have been reviewed by Developers.