Some hackers view their efforts as a form of research and development, or at least user testing, that benefits manufacturers.

Don't defer user testing until you have a fully implemented design.

How poor was the user testing so that it didn't spot the basic flaws?

These systems have been inducted into the Services after rigorous field evaluation and user testing.

There's no point spending money on user testing or heuristic evaluation when the basic minimum standards haven't been applied.

The methods introduced in this article are not intended as a replacement for user testing.

Good accessibility practice consists of three parts: expert review, user testing, and designing to standards.

User-models can thus serve as a cheaper alternative to user testing.

The developers are already working on some fixes based on the feedback from user testing.

We decided not to use access keys after they caused confusion in our user testing.