DUT, UUT, SUT的區別

DUT: device under test
UUT: unit under test
SUT: system under test

Device under test (DUT), also known as unit under test (UUT), is a term commonly used to refer to a manufactured product undergoing testing.

System under test (SUT) refers to a system that is being tested for correct operation. The term is used mostly in software testing. The term SUT means also a stage of maturity of the software, because a system test is the successor of integration test in the testing cycle.