Usability Testing Process Iteration Framework for Mobile Applications

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Addis Ababa University


Mobile applications are playing an increasingly important role in facilitating efficient information exchange, making them a significant driving force in mobilizing businesses and improving productivity. However, the value of any application would be undermined if the user is not able to fully utilize its functionality, thus the role of usability testing process iteration frameworks plays vital role to follow usability design guidelines and conducting testing. This could result in better utilization of the developed app. Therefore, measuring usability is an essential task to ensure the application is accurate, has sufficient in speed and to ensure the safety of the user from strain injury as well. Usability testing in mobile application aims to identify the main issues in the user interface that may lead to human error, terminate the user interaction with the mobile application and cause user frustration. Usability testing frameworks are considered as major success factor and led to higher acceptance for the mobile application since the usability testing is basic of software application development. This paper proposes a usability testing process iteration framework for mobile applications and the framework acts as a structured and general methodology for designing usable mobile apps and evaluating mobile application by collecting usability information among user interaction with mobile applications. In addition, this work also attempts to review the existing interface design guidelines and consequently develop a usability testing process iteration framework. The framework serves as basis for usability testing consisting of guidelines, quality characteristics, goals (interface design criteria), questions, usability metrics and two evaluation instruments (task list and questionnaire). To ensure the effectiveness and reliability of the framework and to examine its performance, it is validated by applying the suggested metrics and evaluation instruments (task list and questionnaire) in a usability study conducted on five mobile applications for mobile users. Therefore, from this usability works results gathered from usability testing proved that the framework is applicable for usability testing of mobile applications.



Mobile App, Usability, Usability Testing, Design Criteria, Framework