Sublime

If you design by focusing on process, you’ll often find yourself drawn into creating features to handle exceptions, problems, and details.

Your user experience needs to be simple enough to work among the distractions and fit into the cracks between interruptions.

data

One of the things that becomes obvious as soon as you do any usability testing—whether you’re testing Web sites, software, or household appliances—is the extent to which people use things all the time without understanding how they work, or with completely wrong-headed ideas about how they work.

Designers further understand that the user experience is as important to customer value as is the underlying functionality.

Team Size

Usability testing is typically the most mature and straightforward form of discovery testing,

simpleandusable.com.