There are two other corollaries of “Build quality in.” Firstly, testing is not a phase, and certainly not one to begin after the development phase. If testing is left to the end, it will be too late. There will be no time to fix the defects. Secondly, testing is also not the domain, purely or even principally, of testers. Everybody on the delivery team is responsible for the quality of the application all the time.

