which of the following statements is not true about customer contact and the customer contact matrix? in the middle ground of customer contact, permeable systems have processes that are penetrated by customers in fairly restricted ways. high-contact services are referred to as buffered core because these processes are buffered or removed from interaction with the customer. operations must be concerned with customer contact because higher contact levels can introduce variability into the process. high contact levels may be costly in terms of lost efficiency but they offer opportunities to increase sales to customer resulting in increased revenues.