RANCANG BANGUN SISTEM INFORMASI LAYANAN DAN KATALOG PRODUK BERBASIS WEB MENGGUNAKAN JAVASCRIPT UNTUK MENYELESAIKAN LAYANAN JASA PADA CV. BAYU RAHARJA ADVERTISING
CV. Bayu Raharja Advertising is a creative-industry enterprise in Bogor engaged in advertising and promotional goods and services. Information about the company profile, services, and product catalog is still delivered conventionally through word of mouth and manual chat, causing repetitive administrative tasks, inconsistent service data, and a market reach limited to personal networks. This study aims to design and build a web-based Service Information and Product Catalog System using JavaScript with the Next.js framework and Supabase as a centralized PostgreSQL backend, so that information delivery can be automated and data consistency maintained. The system was developed through system analysis and design using Unified Modeling Language diagrams (Use Case, Activity, Sequence, and Entity Relationship Diagram), implementation with Next.js and Supabase, and structured testing consisting of White Box Testing, Black Box Testing, and User Acceptance Testing (UAT). The results show that White Box Testing achieved a 100% success rate across five internal logic-path scenarios, Black Box Testing confirmed that all eight functional scenarios ran without error, and UAT involving seven respondents produced an average satisfaction score of 8.71 out of 10, with the overall quality score rising from 4.2 to 4.3 after optimization. These findings indicate that the system is stable and functionally reliable, successfully digitizing company services into a platform accessible independently for 24 hours while reducing the administrative workload that was previously handled manually
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