Supply Chain Management: “A supply chain is the series of activities and organizations that materials …, move through on their journeys from initial suppliers to final customers” (Waters 2007). The main elements of a supply chain include buying, operations, delivery and integration. Purchasing is the initial step of the supply chain (Walmart’s Keys to successful Supply Chain Management, n.d). Specific for the Walmart, it is a critical function as Walmart depends upon the manufactures and distribution center. If there is any disturbance in the supply chain it will affect the whole business of the store.