According to ISO 9241 usability is "the degree 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".
The concept of usability is related to the ease of use of technical or specific objects to quickly reach the specified performance and thus meet the target user, eliminating up to mistakes.
So to design and develop a usable site should answer the following fundamental questions: what is a web site? Who will use it and what do you expect to find?
It can be inferred that the various factors that come into play are:
- the speed factor
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the technical factor - the factor "error"
- the human factor is considered
access to a site that does not hinder guidance, navigation, reading pages and documents, downloading files and interact with form or anything else requiring data input and management of controls, where such operations are performed by one person sufficiently trained in the use of a workstation, equipped with a configuration according to WAI guidelines.
WAI stands for Web Accessibility Initiative, or "Web Accessibility Initiative." This is a section of the World Wide Web Consortium (also known as W3C). The latter is the non-profit international organization, which - by now back in 1994 - has the task of defining the language and standard procedures to make the Web a truly democratic and universal tool.
In 1996, Jacob Nielsen (one of the leading Internet usability experts) had stated in a famous treatise what were the ten most common mistakes in making a web product. Thanks to Nielsen as a precursor, has been noted that many sites had significant gaps, both in structure and navigation.
In Italy, a government, as a municipality or a government entity that wishes to develop its own website, he must refer to the guidelines issued by the Law Minister Lucio Stanca.
Enter the link to the Regulations implementing the law Stanca http://www.governo.it/Presidenza/web/regolamento09072004.html
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