They use this opportunity to test the features of the design that concern them the most. Paper based testing is a common form of usability testing. In most cases, an artist or designer creates mock ups of the design. Then, they show it to a couple of prospective users. They try to catch usability problems in the designs before they use any more production resources.
Many artists choose to draw sketches for paper based testing.
Other artists use screens made in a graphics program of their choice, such as Photoshop or Illustrator. The lack of functionality in paper screens is not a drawback. It allows the designer to see if the user really understands the interface. In a fully functional program, a user may use external cues to clue them into the functionality of the interface. Pilot Testing There are many forms of pilot testing.