<![CDATA[The proliferation of catalog websites has increased demand for both attractive design and reliable software quality, yet many still suffer from malfunctioning features, unclear navigation, and slow response times. While ISO/IEC 25010 is widely used to evaluate software quality, usability testing on product catalog websitesparticularly through Black-Box Testing—remains underexplored compared to academic, government, or news portal websites. This study aims to test the usability characteristics of the Pina Official Store catalog website using a Black-Box Testing approach based on ISO/IEC 25010. Testing was conducted on 24 scenarios covering six usability sub-characteristics: Appropriateness Recognizability, Learnability, Operability, User Error Protection, User Interface Aesthetics, and Accessibility. Results show 19 of 24 scenarios (79.2%) met expected outcomes, categorized as "Good." Appropriateness Recognizability, User Error Protection, and Accessibility scored 100%, while Operability scored lowest (57.1%) due to slow image loading, inactive background audio, and non-clickable footer contact links; Learnability and User Interface Aesthetics also showed minor issues. These findings indicate the website has generally good usability but requires improvement in loading performance, interactive element functionality, and interface consistency to enhance user experience.]]>
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