Quality assurance customer. providing services (Service Level Agreement: SLA) with service quality standards (Quality off Service: QoS) at reasonable prices.
. Customers are guaranteed quality of service (Service Level Agreement: SLA) with service quality standards (Quality off Service: QoS) at a reasonable price.
. customers have quality of service (Service Level Agreement: SLA) with the standard quality of service (Quality off Service:? QoS) at reasonable prices.