The Big 8 Home Interior Management Application, developed using C# Windows Forms, significantly enhances operational efficiency for the Big 8 Home Interior Company by centralizing inventory management, supplier information, and project costing. This desktop application improves data accuracy through real-time updates and automated tracking of materials, orders, deliveries, and staff activities. It supports better decision-making with comprehensive reports and analytics, while automating routine tasks to reduce manual effort and errors. Key features include inventory management, supplier and purchase order tracking, material delivery updates, staff management, and project costing. The application offers streamlined operations, improved resource management, and scalability, providing a tailored solution that meets the company's specific needs and contributes to overall operational efficiency. By integrating essential business functions into a single, efficient desktop application, the project enhances operational efficiency, data accuracy, and overall decision-making. This solution is not only streamlines daily operations but also provides a solid foundation for future growth and scalability of the company.