Which term describes the procedure used to derive or select test cases?

The term that describes the procedure used to derive or select test cases is "test design technique." Test design techniques are systematic approaches that help testers formulate test cases based on specific conditions, requirements, or specifications. These techniques can include black-box testing, white-box testing, boundary value analysis, and equivalence partitioning, among others. By employing these methods, testers can ensure that their test cases are well-structured and effective in uncovering defects.

In contrast, the other terms describe different aspects of the testing process. A test environment refers to the setup, including hardware and software configurations, where testing takes place. A test condition is a specific aspect of the software that can be tested, but it does not inherently guide the creation of test cases. Test execution involves the actual running of test cases, not the procedure for selecting or deriving them. Therefore, "test design technique" is the most accurate term for the procedure of selecting test cases.