Diseño de interfaz de usuario enfocado en la optimización de la usabilidad de la aplicación armonía123 bajo el modelo de doble diamante

Abstract

Abstract: This Curricular Integration Project aims to design and evaluate a proposal for the redesign of the user interface of the Armonía123 web-based billing system, focused on improving usability, accessibility, and operational efficiency in small businesses within the automotive sector. The research was conducted under the Double Diamond model and the principles of User-Centered Design, applying information gathering techniques, heuristic analysis, accessibility evaluation, and usability testing with real users. The current state of the system was compared with the redesign proposal through performance and user experience metrics such as task completion time, completion rate, System Usability Scale (SUS), Net Satisfaction Index (INS), and Customer Effort Score (CES). The results show significant improvements in information architecture, visual clarity, and reduction of cognitive effort, increasing user satisfaction, effectiveness, and productivity, thereby validating the positive impact of the redesign on overall user experience and the system s operational performance.