How does the application of theoretical frameworks in operations management contribute to enhancing efficiency, productivity, and competitiveness within organizations? Explore key theories such as Lean Production, Total Quality Management, Just$-$in$-$Time, and Six Sigma, analyzing their principles, methodologies, and real$-$world applications. Assess the impact of these theories on various aspects of operations, including supply chain management, process optimization, quality control, and organizational performance, highlighting their significance in contemporary business environments.