E-wallet - designed for usability

Abstract: As the use of mobile payment applications (apps) and electronic wallets (e-wallets)increases, so does the demand for a improved user experience when interactingwith these apps. The field of Human-Computer interaction (HCI) focuses onthe design, evaluation, and implementation of interactive computing systems forhuman use. One aspect of HCI is usability, i.e., the quality of the interactions witha product or system. This thesis investigates how an e-wallet can be designed to provide a high level ofusability by conforming to best HCI practices and by formative evaluation using aset of usability evaluation methods.The research process consisted of an initial literature study and developmentof a prototype, which was evaluated iteratively through Thinking-aloud-protocol(TAP) and a combination of performance measurements and questionnaire by achosen test group. By each iteration, the results of the performance measurements, as well as theverbal data improved. The most complex or difficult task, for the test subjectsto perform, was, according to the results, Pay via manual input. All goals wereachieved for all tasks except for the performance goal of a percentage of errorsbelow 5%. To conclude, it was clear that the test subjects had more trouble understandingthe concept of the e-wallet rather than navigating and completing tasks. Thedifficulties lay in understanding how currencies were stored and how transactionshappened. When developing this e-wallet we noticed that the most importantissue was to make new functions and concepts familiar to the user through relatingit to recognizable ideas.