The figure illustrates the process of making dairy products which includes workers and various producing lines with machines.
The initial impression from the graph is that all dairy products are made in the same factory and, the whole production from milking cows to being ready for selling in supermarkets; happens in less than 24 hours.
The first step is that the cows are not ready for the milking stage unless they are grazed well; After milking cows by machines twice a day, the machines have transferred the milk to the refrigeration storage. Then, a milk tanker comes for delivering the milk to the dairy factory which must happen on a daily basis.
The following process is in order to manufacture the milk to any dairy which happens in a factory; First, after some processes, the milk turns into the products like cheese, cream, and butter, but the milk is packaged only if they are pasteurized; and selling the products in supermarkets and shops marks the final stage. 
The figure illustrates the process of making  
dairy
  products
 which includes workers and various producing lines with machines.
The initial impression from the graph is that all  
dairy
  products
  are made
 in the same factory and, the whole production from milking cows to being ready for selling in supermarkets; happens in less than 24 hours. 
The
  first
 step is that the cows are not ready for the milking stage unless they  
are grazed
 well; After milking cows by machines twice a day, the machines have transferred the  
milk
 to the refrigeration storage. Then, a  
milk
 tanker  
comes
 for delivering the  
milk
 to the  
dairy
 factory which  
must
 happen on a daily basis.
The following process is in order to manufacture the  
milk
 to any  
dairy
 which happens in a factory;  
First
, after  
some
 processes, the  
milk
 turns into the  
products
 like cheese, cream, and butter,  
but
 the  
milk
  is packaged
  only
 if they  
are pasteurized
; and selling the  
products
 in supermarkets and shops marks the final stage.