What Is A Supply Chain? The system of suppliers,manufacturers, transportation,distributors,and vendors that exists to transform raw materials to final products and supply those products to customers. That portion of the supply chain which comes after the manufacturing process is sometimes known as the distribution networkWhat Is A Supply Chain? „ The system of suppliers, manufacturers, transportation, distributors, and vendors that exists to transform raw materials to final products and supply those products to customers. „ That portion of the supply chain which comes after the manufacturing process is sometimes known as the distribution network