SQi = perceived service quality of individual “i”;n = number of service attributes/items;P = perception of individual “i” with respect to performance of a service firm attribute “j”.Previously, Parasuraman et al. (1985) identify ten determinants for measuring service quality which is tangibility, reliability, responsiveness, communication, access, competence, courtesy, credibility, security, and understanding/knowledge of customers. Later these ten dimensions were further purified and developed into five dimensions i.e. tangibility, reliability, responsiveness, assurance and empathy to measure service quality. A variant of SERVQUAL, SERVPERF, also includes these five dimensions which identified as follows
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