Lisa Crispin

It includes just about everything beyond unit and component level testing: functional, system, load, performance, security, stress, usability, exploratory, end-to-end, and user acceptance

The customer team includes business experts, product owners, domain experts, product managers, business analysts, subject matter experts—everyone on the “business” side of a project

Testers are also on the developer team, because testing is a central component of agile software development