For a company like Chaparral Steel, why is a commitment to both its internal and external customers necessary?

1. For a company like Chaparral Steel, why is a commitment to both its internal and external customers necessary?
2. As mentioned in the case study, research and development at Chaparral are integrated into product design and development. Do you think this is a good practice? Please explain.
3. Can a manufacturer be low-cost and high quality at the same time? Please explain