The manufacturing process involves many different departments and people to work together. The key to success in quality manufacturing processes depends on the information flow and integration between them.
Assume that the quality department detects a defect in the finished product. Until the quality department identifies the root cause, the production has to be blocked. The root cause is identified. For example, one of the raw materials, the bolt, has a quality problem. Either quality checking has to be improved at the reception for every purchase of a bolt in the warehouse or the purchase department may decide to change the vendor of that part.
A small defect in a finished product leads to the involvement of many different people. It may be possible that the product manager may change the design in the table that leads to the engineering manufacturing change and...