পদ্ধতির তুলনা করুন

	আমেরিকান কাস্টমার স্যাটিসফ্যাকশন ইনডেক্স (ACSI)	E-S-QUAL ইলেকট্রনিক সার্ভিস কোয়ালিটি স্কেল	SERVQUAL সার্ভিস কোয়ালিটি স্কেল
ক্ষেত্র	বিপণন ব্যবস্থাপনা	বিপণন ব্যবস্থাপনা	বিপণন ব্যবস্থাপনা
পরিবার	Process / pipeline	Process / pipeline	Process / pipeline
উদ্ভবের বছর	1996	2005	1988
প্রবর্তক	Claes Fornell, Michael D. Johnson, Eugene W. Anderson, Jaesung Cha, Barbara E. Bryant	A. Parasuraman, Valerie A. Zeithaml, Anantharanthan Malhotra	A. Parasuraman, Valerie A. Zeithaml, Leonard L. Berry
ধরন	Structural equation model for satisfaction and loyalty	Multi-dimensional electronic service quality scale	Multi-dimensional service quality scale
মৌলিক উৎস	Fornell, C., Johnson, M. D., Anderson, E. W., Cha, J., & Bryant, B. E. (1996). The American Customer Satisfaction Index: Nature, Purpose, and Findings. Journal of Marketing, 60(4), 7-18.	Parasuraman, A., Zeithaml, V. A., & Malhotra, A. (2005). E-S-QUAL: A Multiple-Item Scale for Assessing Electronic Service Quality. Journal of Service Research, 7(3), 213-233.	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.
অপর নাম	ACSI, National Customer Satisfaction Index	E-S-QUAL, Online Service Quality Scale	Service Quality Instrument, Gap Model
সম্পর্কিত	4	3	4
সারসংক্ষেপ	The American Customer Satisfaction Index (ACSI), developed by Fornell and colleagues in 1996, is a structural equation modeling-based approach to measuring and predicting customer satisfaction across industries and over time. ACSI assesses customer expectations, perceived value, perceived quality, complaints, and loyalty in a unified framework. Since 1994, ACSI data has been collected quarterly on thousands of customers across diverse U.S. industries, making it a key economic indicator and benchmark for organizational performance.	E-S-QUAL is a 22-item scale developed by Parasuraman, Zeithaml, and Malhotra (2005) to measure service quality in electronic commerce and digital service environments. Adapting the foundational SERVQUAL dimensions to online contexts, E-S-QUAL assesses four core dimensions: Efficiency (ability to complete transactions quickly), Fulfillment (accurate order fulfillment and on-time delivery), System Availability (website uptime and technical performance), and Privacy (security of customer data and transactions). The scale captures both service delivery (how the website functions) and service recovery (how problems are handled).	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.