Editing GOMS (section)

===Disadvantages ===

'''GOMS''' only applies to skilled users. It does not work for beginners or intermediates for errors may occur which can alter the data.<ref name="interaction">{{cite book|title=Interaction Design|last=Rogers|first=Yvonne|author2=Helen Sharp|author3=Jenny Preece|publisher=[[John Wiley & Sons]]|year=2002|location=[[United States of America]]|isbn=0-471-49278-7|page=[https://archive.org/details/interactiondesig0000pree/page/454 454]|url=https://archive.org/details/interactiondesig0000pree/page/454}}</ref>
Also the model doesn't apply to learning the system or a user using the system after a longer time of not using it.<ref name="interaction" />
Another big disadvantage is the lack of account for errors, even skilled users make errors but GOMS does not account for errors.<ref name = "interaction" />
Mental workload is not addressed in the model, making this an unpredictable variable. The same applies to fatigue.<ref name = "interaction" />
GOMS only addresses the usability of a task on a system, it does not address its functionality.<ref name = "interaction" />

User personalities, habits or physical restrictions (for example disabilities) are not accounted for in any of the GOMS models.  All users are assumed to be exactly the same. Recently some extensions of GOMS were developed, that allow to formulate GOMS models describing the interaction behavior of disabled users.<ref>{{cite book|title=Measuring website usability for visually impaired people – A modified GOMS analysis. In: ACM SIGACCESS Conference on Assistive Technology|last=Tonn-Eichstädt|first=H.|publisher=[[ACM Press]]|year=2005|location=[[New York City|New York]]|pages=55–62 | doi = 10.1145/1168987.1168998|s2cid=14257284 }}</ref>
<ref>Schrepp, M. (2006). On the efficiency of keyboard navigation in web sites. Universal
Access in the Information Society, Vol. 5, No. 2, pp. 180-188.</ref>
<ref name="keystroke-level-model">{{cite book|title=The keystroke-level model for user performance time with interactive systems|last=Card|first=Stuart|author-link=Stuart Card |author2=Thomas P. Moran |author2-link=Thomas P. Moran |author3=Allen Newell |author3-link=Allen Newell |publisher=Lawrence Erlbaum Associates|year=1980|isbn=0-13-444910-X | doi = 10.1145/358886.358895 |s2cid=5918086 }}</ref>