Editing Web usability (section)

===ISO approach===
According to [[ISO 9241]] (Ergonomic Requirements for Office Work with Visual Display Terminals), usability is "the extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use". Therefore, web usability can be defined as the ability of web applications to support web-related tasks with effectiveness, efficiency and satisfaction. Effectiveness represents [[Accuracy and precision|accuracy]] and completeness when users achieve a specified goal. Efficiency is resource cost in relation to the accuracy and completeness. Satisfaction is the comfort and acceptability of use.<ref name="Mendes et al 2006">{{cite book|last1=Mendes|first1=Emilia|last2=Mosley|last3=Matera|first3=Maristella|last4=Rizzo|first4=Francesca|last5=Carughi|first5=Giovanni T.|url=https://books.google.com/books?id=id829q6RljsC|title=Web Usability: Principles and Evaluation Methods|journal=Web Engineering|date=2006|pages=143–180|oclc=300263327|doi=10.1007/3-540-28218-1_5|isbn=9783540281962|citeseerx=10.1.1.462.3115}}</ref>