What is DESIGN USABIITY?
Usability addresses the relationship between tools and their users. In order for
a tool to be effective, it must allow intended users to accomplish their tasks in
the best way possible. The same principle applies to computers, websites, and other
software. In order for these systems to work, their users must be able to employ
them effectively.
What makes a website or piece of software usable?
Usability depends on a number of factors including how well the functionality fits user needs, how well the flow through the application fits user tasks, and how well the response of the application fits user expectations. We can learn to be better user interface designers by learning design principles and design guidelines. But even the most insightful designer can only create a highly-usable system through a process that involves getting information from people who actually use the system. Usability is the quality of a system that makes it easy to learn, easy to use, easy to remember, error tolerant, and subjectively pleasing.
