Due to the increasing number of mobile phone users with access to the Internet over the last decade, it has become increasingly necessary to propose usability guidelines designed to be applied to projects made for mobile devices. In Brazil, m-commerce is becoming more and more popular and in the short-term it is likely to reach similar performance numbers as to the traditional ecommerce. However, there are still several websites that are not specifically designed for mobile devices and do not take into account their characteristics and singularities. A review of the existing literature on the subject was undertaken to elicit suggested guidelines for the development of digital interfaces. Based on these guidelines the websites of two retail companies were analyzed. The objective of the analysis was to assess what are the impacts on usability caused by uncritical adaptations of complete websites to mobile versions. This evaluation was done bearing in mind the categorization of usability principles developed by Brangier e Barcenilla (2003). Issues such as: confusing translations, lack of consistency, small touch targets, amongst others, were detected on the analyzed websites. This investigation showed it is possible to make small changes that would result in websites with improved usability.
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机译：由于越来越多的移动电话用户在过去十年中获得互联网的访问，因此越来越必要提出旨在应用于为移动设备制造的项目的可用性指南。在巴西，M-商业正在变得越来越受欢迎，并且在短期内，它可能会达到传统电子商务的类似性数量。然而，仍有几个用于移动设备专门设计的网站，并且不考虑其特征和奇点。对该主题的现有文献进行了审查，以引出建议的数字界面发展准则。根据这些指导，分析了两家零售公司的网站。分析的目的是评估对移动版本的非临界适应造成的对可用性的影响是什么。考虑到Brangier E Barcenilla（2003）开发的可用性原则的分类，进行了这种评价。在分析的网站上检测到诸如：在分析的网站上检测到令人困惑的翻译，缺乏一致性，缺乏一致性，小触摸目标。这项调查显示，可以进行小的变化，将导致具有改善的可用性的网站。
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