This document discusses several key aspects of defining and measuring service quality. It begins by outlining conceptual models that view service quality as having both technical and functional dimensions. It then describes five commonly used dimensions to evaluate service quality: reliability, responsiveness, assurance, empathy and tangibles. The document also discusses using SERVQUAL, a widely adopted instrument, to measure service quality by assessing the gap between customer expectations and perceptions. However, it notes there are some potential problems with solely relying on SERVQUAL scores to develop marketing plans.