The diagram illustrates the main levels of producing various products for customers, and the flow of information to begining stages in order to make changes.
Overall, the diagram shows a liner structure of the manufacturing steps with a few links of information between them flowing the opposite direction to give feedback to the early stages of production.
The manufacture of consumer goods starts with storing raw materials and components. Then comes production planning, which takes an input from design that was created by product research. Next, the components are assembled before getting inspacted and tested; the data gathered from testing is sent back to the design stage. After testing, the products are packaged, despatched, and finally sold to customers.
After the sale, the manufacturers conduct a market research, and the data collected from it is used to inform the design, packaging and advertising stages. Furthermore, the data collected from sales is sent back to the planning and storage level of production to give feedback to those specific steps.