A mathematical model of the finding of usability problems
CHI '93 Proceedings of the INTERACT '93 and CHI '93 Conference on Human Factors in Computing Systems
Are we really entering a post-usability era?
ACM SIGDOC Asterisk Journal of Computer Documentation
Usability engineering for the Web
World Wide Web Journal - Special issue on advancing HTML: style and substance
Web site engineering: beyond Web page design
Web site engineering: beyond Web page design
Empirically validated web page design metrics
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Towards a framework for e-commerce usability
SAICSIT '02 Proceedings of the 2002 annual research conference of the South African institute of computer scientists and information technologists on Enablement through technology
A survey of usability evaluation in virtual environments: classification and comparison of methods
Presence: Teleoperators and Virtual Environments - Virtual environments: Virtual environments and mobile robots: Control, simulation, and robot pilot training
Specifying Quality Characteristics and Attributes for Websites
Web Engineering, Software Engineering and Web Application Development
Assessing a Firm's Web Presence: A Heuristic Evaluation Procedure for the Measurement of Usability
Information Systems Research
Comparing accessibility evaluation and usability evaluation in HagáQuê
CLIHC '05 Proceedings of the 2005 Latin American conference on Human-computer interaction
Heuristic evaluation: Comparing ways of finding and reporting usability problems
Interacting with Computers
The relationship between accessibility and usability of websites
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Experimental evaluation of usability and accessibility of heading elements
W4A '07 Proceedings of the 2007 international cross-disciplinary conference on Web accessibility (W4A)
An evaluation of web accessibility metrics based on their attributes
Proceedings of the 26th annual ACM international conference on Design of communication
Using Google Analytics to Evaluate the Usability of E-Commerce Sites
HCD 09 Proceedings of the 1st International Conference on Human Centered Design: Held as Part of HCI International 2009
The role played by perceived usability, satisfaction and consumer trust on website loyalty
Information and Management
Towards the evaluation of usability in educative websites
International Journal of Technology Enhanced Learning
Evaluating usability evaluation methods: criteria, method and a case study
HCI'07 Proceedings of the 12th international conference on Human-computer interaction: interaction design and usability
Macroscopic characterisations of Web accessibility
The New Review of Hypermedia and Multimedia - Web Accessibility
Automatic web accessibility metrics: Where we are and where we can go
Interacting with Computers
An incremental approach for building accessible and usable web applications
WISE'10 Proceedings of the 11th international conference on Web information systems engineering
Journal of the American Society for Information Science and Technology
Architecting for usability: a survey
Journal of Systems and Software
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The unquestionable relevance of the web in our society has led to an enormous growth of websites offering all kinds of services to users. In this context, while usability is crucial in the development of successful websites, many barely consider the recommendations of experts in order to build usable designs. Including the measurement of usability as part of the development process stands out among these recommendations. One of the most accepted methods for usability evaluation by experts is heuristic evaluation. There is abundant literature on this method. However, there is a lack of clear and specific guidelines to be used in the development and evaluation process. This is probably an important factor contributing to the aforementioned generalized deficiency in web usability. We miss an evaluation method based on heuristics whose measure is adapted to the type of evaluated website. In this paper we define Sirius, an evaluation framework based on heuristics to perform expert evaluations that takes into account different types of websites. We also provide a specific set of evaluation criteria, and a usability metric that quantifies the usability level achieved by a website depending on its type.