Operations Management, a robust theoretical foundation is essential for optimizing processes and enhancing organizational efficiency. Drawing from disciplines like economics, engineering, and behavioral sciences, theories provide frameworks for understanding and improving operational systems. From classic models like Taylorism, focusing on division of labor and efficiency, to contemporary approaches like Lean Management, emphasizing waste reduction and continuous improvement, theories guide decision$-$making and strategic planning. Furthermore, theories such as Total Quality Management and Six Sigma prioritize quality control and customer satisfaction. Effective application of these theories fosters operational excellence, enabling firms to adapt to dynamic market conditions and achieve sustainable competitive advantage.