Final answer:
The supply chain consists of three segments: upstream, internal, and downstream. Each segment has distinct functions and contributes to the flow of goods and services.
Step-by-step explanation:
The three segments of the supply chain are the upstream, internal, and downstream segments. The upstream segment includes all the suppliers, manufacturers, and distributors that contribute to the production and delivery of a product. The internal segment refers to the processes and activities within a company that involve materials management, production, and quality control. The downstream segment includes the wholesalers, retailers, and customers who receive the finished product.
The difference between each segment lies in their specific functions and the flow of goods and services. The upstream segment focuses on sourcing and procuring raw materials, while the internal segment focuses on transforming those materials into finished products. The downstream segment focuses on distribution, marketing, and delivering the finished products to the end customers.