Which of the following statements is incorrect about quality?
O a. Companies should focus more on preventing product failure than on fixing it.
O b. To ensure good quality, everyone takes responsibility for making sure the output meets specifications.
O c. Design quality of a product cannot be changed unless the product design is changed.
O d. Cost of quality can be calculated as the cost to manage defective products.

Who is considered the principal in an agency relationship in procurement?
O a. The sales manager
O b. The material user
O c. The supplier
O d. The purchasing manager