Take measures to check the quality, performance, or reliability of (something), esp. before putting it into widespread use or practice. A procedure intended to establish the quality, performance, or reliability of something, esp. before it is taken into widespread use..A test case in software engineering is a set of conditions or variables under which a tester will determine whether an application or software system is working correctly or not. The mechanism for determining whether a software program or system has passed or failed such a test is known as a test oracle. The test and measurement industry centers on the production of tools used to analyze, validate, and verify measurements of electronic and mechanical systems. Due to the increasing need for greater accuracy and higher definition measurement, the tools involved in the test and measurement industry are constantly developing to accommodate technological advancements in the industries they cater to.