The illustration given demonstrates the sequential stages of the production of milk and dairy products. Overall, this is a man-made linear process, commencing with the milking of cows, and ending in delivery of milk and related merchandise to the customers.
In the initial stage, cows are conveyed to the milking machines to milk two times a day, by which those amount of milk is kept in the refrigeration storage. Then, the quantity of milk is transported to the dairy by a vehicle called a milk tanker.
Turning to the final stage, those amount of milk is either pasteurized and packed, or being used to make other dairy products such as cheese, cream and butter. Eventually, milk and other dairy merchandise are moved to shops and supermarkets to sell to the customers.
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