<![CDATA[The sales and building material data collection processes at TB DD Jaya Bangunan are currently still carried out conventionally and manually. This results in limited consumer reach, slow product searches by staff, and price and stock availability information that is often updated late. This study aims to design a web-based Digital Product Catalog Information System with a building material search feature to improve operational efficiency, provide information transparency to customers, and expand market reach. The system development method used is the Spiral method, which is carried out through the stages of planning, risk identification, engineering and modeling, as well as prototyping and evaluation. Data collection was carried out through observation, interviews, and document studies. This system was designed using Unified Modeling Language (UML) and built using PHP, HTML, CSS, and MySQL database. The results of this study indicate that the proposed system is capable of facilitating customers in searching for materials and ordering remotely, as well as assisting the store in managing product data, inventory, and sales reports more structurally and accurately. Functional testing using the Black Box method proved that all main system features have operated well in accordance with user requirements.]]>
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