Usability and user experience : measurement model

Abstract: Software quality is one of success factors in software development. Usability and user experience (U&UX) as a part of software quality is becoming more and more important. Although, there has been successful attempts to formalize specific parts of U&UX there is still a need for a systematic framework of U&UX evaluation. This thesis is aimed to study the state of the art in U&UX evaluation in order to develop a single framework that comprises existing knowledge on the topic. Furthermore, the U&UX evaluation framework is aimed to support product development in industry and provide a versatile guide for U&UX practitioners. The study is based on reference based systematic review. The literature review covers both scientific publications and industrial grade papers. The papers to be reviewed were selected by their relevance to the study goals and credibility of the source. The result of this is three layer U&UX evaluation framework. First layer of the Model features breakdown structure of usability and user experience. Total number of usability and context of use attributes is 217. Second layer of the model contains guidelines of how to perform usability evaluation. Third layer features validation strategies and guidelines on how to expand the Model. In order to enable practical use of the Model both static and dynamic validation should take place. There are many models in place attempting to formalize U&UX evaluation. However, most of them focuses on particular branch of usability or are too broad to be applied practically without adaption. Furthermore, there are many resources offering practical usability and user experience checklists or guidelines. However, most of them lack connection with industry standards such as ISO/IEC 9126. The Model presented in this thesis attempts to fill the gap between high level industry standards and cook book style U&UX guidelines.