Device Under Test (DUT)

Definition - What does Device Under Test (DUT) mean?

A device under test (DUT) is a device that is being tested to determine performance and proficiency. A DUT can also be a component of a bigger module or unit called a unit under test (UUT). A DUT is checked for defects to make sure the device is working. The testing is designed to prevent damaged devices from entering the market, which can also save on manufacturing costs.

A DUT is usually tested by automatic or automated test equipment (ATE), which may be used to conduct simple or complex testing, depending on the device tested. ATEs can include testing performed on software, hardware, electronics, semiconductors or avionics.

Techopedia explains Device Under Test (DUT)

The majority of high-tech ATE structures utilize automation to execute a test quickly. Automation uses IT and control systems to limit human interaction. Depending on the module during testing, the DUT can be attached to the ATE using a variety of connectors, such as pogo pins, a bed of nails tester, microscopic needles and zero insertion force (ZIF) sockets or contactors.

Because there are a wide variety of DUTs, the testing procedures can vary. However, in all DUT testing, if a first out-of-tolerance value is identified, the testing stops immediately and the DUT fails the assessment.

There are different types of DUT testing. Such testing could be done for semiconductors, overall electronics, or other devices.

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