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Clarifying the Metrics of Usability Version 1 . 0 April 11 , 2001

Classification of the metrics used for the measurement of usability in the iterative design process as well as through out the product lifecycle will be clarified. The use of metrics for specifying usability will be compared with measuring usability for diagnostics. A different approach will be suggested combining the ISO definition of Usability, the theory of Innovation Diffusion, and incorporating the measures of Inherent and Apparent Usability.