The document discusses service quality gaps. It defines service quality gaps as the difference between customer expectations of service and their actual perceptions of received service. It identifies 5 main gaps: (1) between customer expectations and management perceptions, (2) between management perceptions and service quality specifications, (3) between specifications and service delivery, (4) between delivery and external communications, and (5) between expected and perceived service. It then analyzes service quality gaps in banking, public transport, electricity distribution, and airlines.