The document discusses the GAPS model of service quality. It describes 7 potential gaps between customer expectations and perceptions of service: 1) knowledge gap, 2) standards gap, 3) delivery gap, 4) internal communications gap, 5) perceptions gap, 6) interpretation gap, and 7) service gap. The largest gap is the service gap, which is the difference between expected and perceived service. The document provides recommendations for closing each gap to improve service quality.