BVT is BuildVerificationTest, basic verification test, the completion of the code compiled and linked, resulting in a structure, the main function to check whether the program will work the same as expected. DVT is DesignVerificationTest short, design verification testing, the production of hardware detection part of an indispensable, including mold testing, electronic properties, the appearance of the test and so on. PVT full name ProcessVerificationTest, which means small batch process verification testing, a hardware testing, we examine the implementation of new models of the functional status and the stability and reliability testing EVT-EngineerVerificationTest, engineering validation test samples