In agile projects, quality is the responsibility of the Whole Team: they 'own' the product and have responsibility for its successful delivery. An agile testing team therefore, will have responsibility not just for integration and system test, but will also work closely with both developers and the business representatives to ensure quality across all test levels. This includes supporting and collaborating with business representatives to help them create suitable acceptance tests. Any consultations or meetings in which product features are presented, analyzed or estimated will involve the Whole Team. The concept of involving testers, developers and business representatives in all feature discussions has been called the 'Power of Three' [Crispin and Gregory, 2009].
The text above is a sample from the upcoming Agile Tester Add-On that will be released in early 2014. Visit www.istqb.org to get latest information.