Usability Evaluation of SatNav Application on Mobile Phone Using mGQM

SatNav systems are becoming increasingly popular, enabling drivers to locate and drive to their desired destination. With high demand for the features SatNav provides, these applications are now also available in mobile phones. This gives rise to the question of whether the app is usable when installed in a mobile phone. This paper will examine the usability of SatNav apps inside the mobile phone. We employ a mobile Goal Question Metric model (mGQM) to evaluate the usability of such applications by implementing usability test for objective measures, and questionnaire and interviews to assess subjective measures. Results indicate that most usability problems on SatNav apps in mobile are influenced by unique features of the mobile phone.