Catalog Web Design as a Product Information Medium Using the User Centered Design (UCD) and Waterfall Methods at PT. Sigma Sejuk Indonesia Jakarta

Abstract

Manual dissemination of product information through printed brochures and direct messaging can delay updates and limit customers' access to accurate, consistent, and comprehensive product specifications. This study aimed to develop a centralized web-based product catalog for PT Sigma Sejuk Indonesia in Jakarta by integrating User-Centered Design (UCD) principles with the Waterfall software development model. Data were collected through observations, stakeholder interviews, and user requirements assessments. Five participants, comprising two administrators and three customers, were purposively selected to identify system requirements and evaluate usability. The system was developed using the Laravel framework and MySQL database management system, incorporating role-based access control, product and category management, keyword-based search, category filtering, detailed product information, and WhatsApp-based customer inquiries. System evaluation involved eight black-box functional testing scenarios, task-based usability assessments, and follow-up interviews. All eight functional testing scenarios passed, indicating that the evaluated authentication, product management, search, and filtering functions operated as expected. Regarding perceived usability, three participants rated the interface as very easy to use, while the remaining two rated it as easy to use. These findings suggested that incorporating UCD activities into the Waterfall development stages supported alignment between system functionality, user requirements, and interface usability within the evaluated setting. The developed web catalog fulfilled the principal functional requirements and provided a centralized platform for managing and disseminating product information. Nevertheless, further evaluation involving a larger and more diverse user population, along with performance and scalability testing, was necessary to establish the system's broader usability, technical robustness, and long-term operational benefits.