Novel Adaptive TOPSIS for User-Centered Mobile University Libraries: Enhancing Usability and Engagement

The rapid development of mobile technology has prompted universities to enhance digital library services. However, many existing mobile library applications still suffer from usability issues, reducing user satisfaction and effectiveness in information access. This study aims to design and evaluate a mobile university digital library interface by integrating an Adaptive TOPSIS method with a User-Centered Design (UCD) approach. The research followed several stages: user needs analysis, criteria weighting using Adaptive TOPSIS, interface design, prototyping, and iterative usability testing with 30 university students. Adaptive TOPSIS was employed to prioritize design alternatives based on user preferences, enabling more objective and adaptive decision-making during the design process. The prototype included book searching, digital catalog access, and online borrowing features. Usability testing measured effectiveness, efficiency, and satisfaction. The system achieved a task success rate of 92%, average task completion time of 18.4 seconds, and error rate of 5.6%. The System Usability Scale (SUS) score averaged 84.2, indicating excellent usability. These results demonstrate that combining Adaptive TOPSIS with UCD significantly enhances both decision-making in design and overall user experience. This study underscores the value of integrating multi-criteria decision-making methods with user-centered UI/UX design to improve accessibility, efficiency, and satisfaction in mobile university digital libraries.