RANCANG BANGUN SISTEM POINT OF SALE (POS) BERBASIS WEBSITE DENGAN METODE WATERFALL PADA TOKO NANS BEAUTY TOILI

In the era of digitalization and technological advancement, one sector experiencing significant change is the trade industry, including retail stores. These stores face challenges in managing transactions, inventory, and other operational aspects efficiently and accurately. Most retail stores use cash registers or record transactions manually. This is also a challenge at Nans Beauty Toili Store, with issues like difficulties in inventory input, slow transaction processing during busy times, and frequent errors in sales reporting and reconciliation. Technological advancements have highlighted the limitations of conventional cash registers, which only record and calculate transactions. As a result, new developments have emerged, such as Point of Sale (POS) software. POS can be defined as software that facilitates recording and transactions within a company. Therefore, this study aims to design a web-based POS system to improve efficiency, accuracy, and customer experience in transaction processing and inventory management. The research methods used include the waterfall method for system design and Blackbox Testing for system testing. The results show that the POS system at Nans Beauty Toili Store has restricted user access roles—Administrator, Supervisor, and Operator (cashier)—to meet specific user needs. Based on Blackbox Testing across eight parameters from login to logout, the system operates in line with the designed specifications.