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	Mått för gränssnittsanvändbarhet (IUM)	NASA Task Load Index (NASA-TLX)
Ämnesområde	Ergonomi och human factors	Ergonomi och human factors
Familj	Process / pipeline	Process / pipeline
Ursprungsår	1986	1988
Upphovsperson	John Brooke, James R. Lewis	Sandra G. Hart & Lowell E. Staveland
Typ	Self-report	Self-report
Ursprungskälla	Brooke, J. (1986). System Usability Scale (SUS): A quick and dirty usability scale. In B. Weerdmeester & M. Evaluating the Usability of Human-Computer Interfaces (pp. 5-7). IOS Press.	Hart, S. G., & Staveland, L. E. (1988). Development of NASA-TLX (Task Load Index): Results of empirical and theoretical research. In P. A. Hancock & N. Meshkati (Eds.), Human Mental Workload (pp. 139-183). Elsevier Science Publishers.
Alias	IUM, Usability Assessment, System Usability Scale	NASA-TLX, TLX
Närliggande	4	4
Sammanfattning	Interface Usability Measure (IUM), exemplified by the System Usability Scale (SUS) developed by John Brooke in 1986 and extended by Lewis and others, is a rapid, single-scale or multi-item assessment of perceived interface usability. IUM captures how easy, intuitive, and satisfying users find an interactive system, ranging from 10-item SUS questionnaires to custom domain-specific usability measures. IUM is widely used in software development, web design, and human-factors research to quantify user perception of system ease-of-use and guide iterative interface improvement.	The NASA Task Load Index (NASA-TLX) is a multidimensional subjective workload assessment tool developed by Sandra Hart and Lowell Staveland at NASA's Ames Research Center in 1988. It measures six dimensions of cognitive and physical task load to quantify operator workload across diverse task domains, from aviation and process control to human-computer interaction. The TLX has become the gold standard for workload measurement in human factors research and applied settings.