Abstract
The mobile industry faces challenges in designing software usability and user experience (UX) measurement instruments. The major difficulties arise due to: 1) diversity of definitions and terminology used for usability and UX aspects and attributes, which lead to inconsistencies, and 2) lack of a taxonomy for these attributes with links to well-defined measures in the literature. In this paper, we present a framework to support mobile industry to overcome these challenges. We first unified the terminology and definitions for usability and UX attributes in the literature. Then, we created taxonomy of attributes and sub-attributes. By using the well-known Goal Question Metric (GQM) approach, we identified a comprehensive set of questions and measures for each attribute that could be used as a basis for developing measurement instruments. The framework was evaluated through a case study conducted in a usability research, development and consultancy company for mobile industry in Sweden.