Linganisha mbinu

	Skeli ya Ubora wa Huduma ya SERVQUAL	Kiwango cha SERVPERF
Nyanja	Usimamizi wa Masoko	Usimamizi wa Masoko
Familia	Process / pipeline	Process / pipeline
Mwaka wa asili	1988	1992
Mwanzilishi	A. Parasuraman, Valerie A. Zeithaml, Leonard L. Berry	Joseph J. Cronin Jr., Steven A. Taylor
Aina	Multi-dimensional service quality scale	Performance-only service quality scale
Chanzo asilia	Parasuraman, A., Zeithaml, V. A., & Berry, L. L. (1988). SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality. Journal of Retailing, 64(1), 12-40.	Cronin, J. J., & Taylor, S. A. (1992). Measuring Service Quality: A Reexamination and Extension. Journal of Marketing, 56(3), 55-68.
Majina mbadala	Service Quality Instrument, Gap Model	Perception-Only Service Quality Scale, SERVPERF-Performance Model
Zinazohusiana	4	4
Muhtasari	SERVQUAL is a 22-item, multi-dimensional scale developed by Parasuraman, Zeithaml, and Berry in 1988 to measure consumer perceptions of service quality. It captures the gap between customer expectations and actual service performance across five core dimensions: Tangibles, Reliability, Responsiveness, Assurance, and Empathy. The instrument has become the most widely used tool for service quality assessment in marketing research and practice.	SERVPERF, developed by Cronin and Taylor in 1992, is a streamlined service quality measurement instrument that evaluates perceived service performance only, without the expectation component. Using 22 items identical in content to SERVQUAL but applied to perception alone, SERVPERF reduces survey burden while maintaining dimensional coverage of Tangibles, Reliability, Responsiveness, Assurance, and Empathy. Empirical evidence suggests SERVPERF performs equally well or better than SERVQUAL in explaining overall satisfaction.