Material flows involve the flow of raw materials, physical products, supplies, and so forth along the supply chain.
In the supply chain, material flows handle the flow of all physical products from the distributor all the way down to delivering to the consumers. Typically, the flow of material usually starts with the raw material distributor to manufacturers to warehouses, and delivery to the final consumer.
Material flow is unidirectional as it usually flows in one direction, that is from distributor to consumer. However, on certain occasions, when a product is returned from the consumer, material flows go in another direction; as the concerns relating to customer returns and service needs are also part of material flows.
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