A method to standardize usability metrics into a single score

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A method to standardize usability metrics into a single score
Current methods to represent system or task usability in a single metric do not include all the ANSI and ISO defined usability aspects: effectiveness, efficiency & satisfaction. We propose a method to simplify all the ANSI and ISO aspects of usability into a single, standardized and summated usability metric (SUM). In four data sets, totaling 1860 task observations, we show that these aspects of usability are correlated and equally weighted and present a quantitative model for usability. Using standardization techniques from Six Sigma, we propose a scalable process for standardizing disparate usability metrics and show how Principal Components Analysis can be used to establish appropriate weighting for a summated model. SUM provides one continuous variable for summative usability evaluations that can be used in regression analysis, hypothesis testing and usability reporting. ACM Classification H5.2 [Information Interfaces and Presentation]: User Interfaces ? Standardization; Bench...
Jeff Sauro, Erika Kindlund
Added 30 Nov 2009
Updated 30 Nov 2009
Type Conference
Year 2005
Where CHI
Authors Jeff Sauro, Erika Kindlund
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