Quality of Service is discounted until you count it
Conclusion: When conceiving and designing new services, the primary focus of product managers and technologists is often on functionality, and adequate quality of service is largely assumed as a given. Similarly, from the perspective of a potential user of a new service – the user is mainly concerned about the functional fit of the service, and is prone to making implicit assumptions about quality of service based on brief experimental use of a service. The best service level agreements not only quantify quality of service, they also provide strong incentives for services provider and service users to cooperate and collaborate on continuous improvement.