Supply Chain Performance refers to the extended supply chains activities in meeting end-customer requirements, including product availability, on-time delivery, and all the necessary inventory and capacity in the supply chain to deliver that performance in a responsive manner. Supply Chain Performance crosses company boundaries since it includes basic materials, components, subassemblies and finished products, and distribution through various channels to the end customer. It also crosses traditional functional organization lines such as procurement, manufacturing, distribution, marketing & sales, and research & development. To win in the new environment, supply chains need continuous improvement. With this regard, Discuss in detail, the fundamental methodologies used to measure the supply chain performance