EVALUASI DAN PENYEMPURNAAN DESAIN ANTARMUKA PADA WEBSITE E-COMMERCE LOKAL DENGAN PENDEKATAN USER-CENTERED DESIGN (UCD)

Abstract

The rapid expansion of information technology and the internet has driven the widespread adoption of e-commerce as a primary medium for online transactions. Nevertheless, numerous platforms continue to encounter challenges in their User Interface (UI), which negatively affect overall user experience. This study aims to evaluate and enhance the Sayurbox website interface by applying a User-Centered Design (UCD) approach to ensure stronger alignment with user needs and expectations. The research methodology includes observation, literature review, questionnaire distribution, development of user personas, requirement analysis, wireframe creation, high-fidelity design, and evaluation using the System Usability Scale (SUS), involving 45 respondents as representative users. The initial evaluation yielded an average SUS score of 33.07, categorized as Poor and Not Acceptable, indicating low effectiveness, efficiency, and user satisfaction with the existing interface. Following the UCD-based redesign, the SUS score improved to 61.06, classified as Marginal Acceptable, reflecting an 84% increase. This improvement was accompanied by a shift in user feedback from fundamental usability problems—such as navigation issues, readability constraints, and layout inconsistencies—to more detailed and refinement-oriented suggestions. These outcomes demonstrate a substantial enhancement in user experience, although further interface optimization remains possible. The study produces an interactive prototype along with initial front-end and back-end implementations that can serve as a basis for continued development. Overall, the findings contribute to improving UI/UX quality within e-commerce platforms and provide valuable references for academic research related to UCD application in evaluating and refining website interfaces.