Bob Galen has noticed that when it comes to agile quality and testing practices, people tend to be either all in or under-practicing some techniques. But it is the interplay across practices that is most important for effectiveness. Here, he discusses his three pillars of agile quality and testing.

Most defects are due to poorly defined requirements and incomplete test coverage, and fixing an error is cheaper at the coding phase than during testing. In order to ensure more thorough testing, try functional workflow documentation, four-dimensional test coverage, and risk-based prioritization.

To ensure end-to-end accessibility coverage, it is imperative for accessibility testers to have knowledge of different types of disabilities and the challenges they pose to end-users. Testers who understand users' requirements and know what to check for will provide a better accessibility outcome.