A way of developing software where the test cases are developed, and often automated, before the software to run those test cases has been written

A high-level description of the test levels to be performed and the testing within those levels for an organization or programme (one or more projects)

An approach to software development based on iterative incremental development, where requirements and solutions evolve through collaboration between self-organizing cross-functional teams

A way of testing software where test design and test execution occur at the same time, guided by a test charter during time-boxed testing sessions