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TQM is a management approach that focuses on continuous improvement in the quality of products and services offered by an organization. The aim of TQM is to meet and exceed customer expectations by involving all employees in the improvement process and focusing on long-term success. JIT is an inventory management strategy that aims to minimize inventory levels and reduce waste by producing or delivering goods just in time for their use or sale. The objective of JIT is to streamline production processes, eliminate waste, and ultimately reduce costs.

TQM principles include customer focus, continuous improvement, employee involvement, management commitment, and fact-based decision making. These principles help organizations to ensure that they deliver their products or services in the most efficient and cost-effective way, all the while maintaining high quality. JIT principles include minimizing inventory levels, reducing lead times, streamlining production processes, and synchronizing supply with demand. By doing this, organizations can save on inventory costs, reduce wasted resources and time, and respond quickly to customer needs.

TQM and JIT are interrelated and complementary management approaches. TQM is focused on delivering high-quality products and services to customers consistently, and JIT supports this by minimizing inventory levels and reducing waste in production processes. JIT depends on TQM in the sense that, without an emphasis on total quality, a company cannot successfully implement JIT. For example, reducing inventory levels and lead times can lead to disruptions in the production process if the quality of inputs or processes is not maintained. Therefore, JIT relies on TQM to ensure that the quality of the products/services being produced/delivered is not compromised. On the other hand, JIT promotes TQM by instilling a culture of continuous improvement within the organization. By streamlining production processes and reducing waste, JIT practices help improve efficiency and effectiveness in all aspects of the business. This supports TQM efforts to continuously improve the overall quality of products and services.

In conclusion, Total Quality Management (TQM) plays a crucial role in Just-In-Time (JIT) as their principles are interrelated. JIT depends on TQM to ensure that the quality of products and services is not compromised, while at the same time, JIT promotes TQM by fostering a culture of continuous improvement within the organization. Therefore, both approaches are necessary for organizations to achieve operational excellence, reduce costs, and meet or exceed customer expectations.