Usability Testing

In Usability Testing, we verify that the system should be easy to use for the end users. The Main Focus in this testing to make software easy to use, flexible, attractive, easy to operate, easy to learn, fast and system should meet it's objective. Usability Testing done with end user perspective

Usability Testing is the Black Box Testing and also Non Functional Testing.

Things that need to check in Usability Testing

• Web page loading time should not be much more
• Font size and font type should be properly visible
• User can use keyboard properly like all keyboard action should be perform properly. Like if user press TAB key , cursor commend should be shifted to the next web element. On ESC key, cancel button should work if there are only 2 buttons on web page. On CAPS key, web page should remind us that your system CAPS key is open.  
• Error and Successful message should be proper
• Navigation from one page to another page should be correct
• If any page deleted or user put some wrong URL then there should be a proper message on that broken page
• Company Logo should be linked to Home page
• Font type should be similar in whole internal pages
• All URLs should be user friendly
• Page Title should be self explainable. 
• All Web element should be properly aligned in all browsers.

Usability Testing concern only the design and navigation so this Testing should be start from the Design Phase. But later too in each steps it should be verify because may be due to some changes, design get distorted.