$63$ : $82$ : $46$ : $92$ : $27$"What are the foundational theories underpinning operations management? Explore how concepts like Lean Management, Total Quality Management $($TQM$),$ and Just$-$In$-$Time $($JIT$)$ systems contribute to operational efficiency. Discuss the significance of operations strategy in achieving organizational objectives and sustaining competitive advantage. Additionally, analyze the role of theories such as Theory of Constraints $($TOC$)$ and Six Sigma in optimizing processes and improving overall performance in diverse industries."