This report provides an in-depth analysis of Marks & Spencer's supply chain management, covering key aspects such as customer service, inventory management, transportation, warehousing, and competitive advantages. The report begins with an introduction to supply chain management and its significance, followed by an examination of M&S's inventory methods, including safety stock and reorder level, and inventory management techniques like EOQ, Pareto analysis, and ABC analysis. The report further explores the modes of transportation used by M&S, the role of Logistics Service Providers (LSPs), and the efficiency of their supply chain. The analysis extends to warehousing and capacity management, discussing the use of warehousing management systems and the challenges in managing capacity. Finally, the report assesses M&S's strategy and competitive advantages, offering insights into how the company can improve its supply chain. The report utilizes relevant logistics and supply chain management concepts and models throughout, and provides a critical assessment of the findings, with suggestions for improvement.