The characteristic of products, materials, systems, designs, etc. that relates to ease of use. Criteria may include, but are not limited to, clarity and transparency of directions, amount of time it takes to become proficient, how well tasks are performed, and how efficiently tasks are done. Prior to 2004, the Identifiers "Usability" and "Usability Edit" may have been used to index this concept.
Added to ERIC: 11/5/2010