Usability always deals with friendly environment, for example if we take any product, HELP feature is the most common thing in the products, So instead of HELP widget, there is a question mark(?), here the usability is lost. Some times Usability of a new product would be difficult even though if it is user friendly, USABILITY will be high.
TESTER's WORLD [ QUOTE ]
LIFE begins when we loose,
life ends when we win,
So, make sure that,you always win.