Quality in an Agile World BY SCOTT AMBLER

software development. The majority of agil ists take a test-driven approach to development where they write a unit test before they write the domain code to fulfill that unit test, with the end result being that they have a regression unit test suite at all times. They also consider acceptance tests as first-class requirements artifact, not only promoting regular stakeholder validation of their work but also their active inclusion in the modeling effort itself. Agilists refactor their source code and database schema to keep their work at the highest possible quality at all times. The challenge for quality professionals is that agilists work in a highly collaborative and evolutionary (iterative and incremental) manner, often requiring traditional quality professionals to change their approach.