Final answer:
The plates that were already shipped before the problem was corrected resulted in external failure quality costs.
Step-by-step explanation:
The plates that were already shipped before the problem was corrected resulted in external failure quality costs.
External failure costs are incurred when defective products are shipped to customers and result in customer complaints, returns, and warranty claims. In this case, the plates that were shipped with the incorrect coating thickness would likely result in customer dissatisfaction and potential returns or refunds.
These costs can include expenses related to customer support, product replacement or repair, and damage to the company's reputation. It is important for companies to minimize external failure costs by implementing effective quality control measures to prevent defective products from reaching customers.