Explain the principles and methodologies of Total Quality Management $($TQM$)$ in Operations Management, detailing its significance in enhancing organizational performance and competitiveness. Discuss the key components of TQM$,$ including customer focus, continuous improvement, and employee involvement, and how they contribute to achieving quality excellence. Explore quality management tools and techniques employed in TQM$,$ such as Six Sigma, Lean Management, and Quality Circles, highlighting their application in process optimization and defect reduction. Analyze the role of leadership commitment, organizational culture, and employee empowerment in fostering a TQM culture within an organization. Provide examples of successful TQM implementation in various industries, showcasing its impact on product quality, customer satisfaction, and overall business success.