Which of the following statements are correct?

a) 

A user-based definition of quality means that if the customer is

satisfied, the product has good quality.

b)  Serviceability and tangibles are dimensions of service quality.

c) 

Supply chain management grew out of the value chain. The value chain

includes inbound logistics, core processes and outbound logistics.

d) 

The trend “customer relationship management” means that marketing is

directed at improving communication between the customer and the supplier.

e) 

Statistical process control is an engineering-related

contribution to quality management.