Excellence in customer service is the hallmark of success in service industries and among manufacturers of products that require reliable service. But what exactly is excellent service? It is the ability to deliver what you promise, say the authors, but first you must determine what you can promise. Building on seven years of of research on service quality, they construct a model that, by balancing a customer's perception of the value of a particular service with the customer's need for that service, provides brilliant theoretical insight into customer expectations and service delivery.The authors' groundbreaking model, which tracks the five attributes of quality service - reliability, empathy, assurance, responsiveness, and tangibles - goes right to the heart of the tendancy to overpromise. By comparing customer perceptions with expectations, the model provides marketing managers with a two-part measure of perceievd quality that, for the first time, enables them to segment a market into groups with different service expectations.