This research paper explores Just-in-Time (JIT) inventory management, examining its core principles and diverse applications across various industries. It elucidates the fundamental concepts of JIT, including waste reduction, continuous improvement, and the significance of supplier relationships. The study also investigates the practical implementation of JIT, focusing on its challenges and benefits in real-world scenarios. Furthermore, the paper analyzes the impact of JIT on operational efficiency, cost reduction, and overall supply chain performance.