What is Entry Criteria, Exit Criteria and Suspension Criteria?

Entry Criteria: Criteria set to which the testing should begin and the criteria to which the testing could be stopped.  Example: All source code is unit tested, all hardware, software are in place, the test environment is set.

Exit Criteria:  Criteria that decide the completion or termination of the testing. Example: All test cases have been executed, deadlines reached

Suspension Criteria: The criteria to which the testing will be suspended. Example: If the team members report that there are 40% of test cases failed, you should suspend testing until the development team fixes all the failed cases.