Article · Wikipedia archive · Last revised Jun 12, 2026

SERVQUAL

SERVQUAL is a research tool that measures customer perception of service quality by comparing what customers expect from a service to their assessment of the service actually delivered. The instrument was developed in the United States in the mid-1980s by researchers A. Parasuraman, Valarie Zeithaml, and Leonard L. Berry, and is designed for use in after-service evaluation processes. It assesses service quality across five dimensions: reliability, assurance, tangibles, empathy, and responsiveness. SERVQUAL has been applied in sectors including healthcare, banking, education, and libraries.

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SERVQUAL is a research tool that measures customer perception of service quality by comparing what customers expect from a service to their assessment of the service actually delivered.1 The instrument was developed in the United States in the mid-1980s by researchers A. Parasuraman, Valarie Zeithaml, and Leonard L. Berry, and is designed for use in after-service evaluation processes.2 It assesses service quality across five dimensions: reliability, assurance, tangibles, empathy, and responsiveness.3 SERVQUAL has been applied in sectors including healthcare, banking, education, and libraries.4

Overview

The SERVQUAL questionnaire consists of matched pairs of items, 22 expectation items and 22 perception items, organized into five dimensions that correspond to the consumer's mental framework for evaluating service quality.5

Each item is part of a pair: one question asks what excellent organizations in a given industry should offer (expectation), and the other asks how the specific organization being evaluated performs (perception).6

SERVQUAL dimensions with sample items
Dimension Sample expectation item Sample perception item
Reliability When excellent telephone companies promise to do something by a certain time, they do so. XYZ company provides its services at the promised time.
Assurance The behaviour of employees in excellent banks will instil confidence in customers. The behaviour of employees in the XYZ bank instils confidence in you.
Tangibles Excellent telephone companies will have modern‑looking equipment. XYZ company has modern‑looking equipment.
Empathy Excellent banks will have operating hours convenient to customers. XYZ bank has convenient operating hours.
Responsiveness Employees of excellent telephone companies will never be too busy to help a customer. XYZ employees are never too busy to help you.

The model of service quality

The model of service quality, referred to as the gaps model, was developed by Parasuraman, Zeithaml, and Berry during a systematic research program conducted in the 1980s.7 The model identifies five gaps that may cause customers to experience poor service quality.

In this framework, gap 5 is the service quality gap, which represents the difference between customer expectations and their perceptions of the service. This is the only gap that can be directly measured, and the SERVQUAL instrument was designed specifically to capture it.8 Gaps 1 through 4 have diagnostic value and point to probable causes of service failures.

Summary of gaps with diagnostic indications9
Gap Description Probable causes
Gap 1
The Knowledge Gap 		Difference between the target market's expected service and management's perceptions of those expectations. Insufficient marketing research; inadequate upward communication; too many layers of management.
Gap 2
The Standards Gap 		Difference between management's perceptions of customer expectations and the translation into service procedures and specifications. Lack of management commitment to service quality; employee perceptions of infeasibility; inadequate goal setting; inadequate task standardisation.
Gap 3
The Delivery Gap 		Difference between service quality specifications and the service actually delivered. Technical breakdowns or malfunctions; role conflict or ambiguity; lack of perceived control; poor employee‑job fit; poor technology fit; inadequate supervision or training.
Gap 4
The Communications Gap 		Difference between service delivery intentions and what is communicated to the customer. Lack of horizontal communications; poor communication with advertising agency; inadequate communications between sales and operations; differences in policies and procedures across branches or divisions; propensity to overpromise.

Development of the instrument

Development of the model of service quality began in 1983 and, after iterative refinements, led to the publication of the SERVQUAL instrument in 1988.10 The research team conducted in-depth interviews and focus groups in four service sectors: retail banking, credit card services, securities brokerage, and product repair and maintenance.11 The questionnaire was tested across multiple samples to verify its reliability, validity, and factor structure.12

Adaptations and variants

SERVQUAL has been adapted for specific industries and contexts. Well‑known derivatives include:

  • LibQUAL+ – a library service quality survey developed by the Association of Research Libraries.13
  • EDUQUAL – an instrument tailored for the evaluation of service quality in educational institutions.14
  • HEALTHQUAL – adapted for measuring patient perceptions of healthcare service quality.15
  • ARTSQUAL – used to evaluate visitor perceptions of quality in museums and performing arts venues.16

Criticisms

Researchers have raised several concerns about SERVQUAL. Critics argue that the instrument's definition of expectations is ambiguous and that it does not adequately account for the dynamic nature of customer expectations over time.17 Other scholars question whether the five‑dimension structure is universally applicable across all service contexts, and whether a generic instrument can capture the unique attributes of specific industries without modification.18

See also

See also

References

References

  1. Parasuraman, A.; Zeithaml, Valarie; Berry, Leonard L. (1988). "SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality". Journal of Retailing. 62 (1): 12–40.
  2. Parasuraman, A.; Zeithaml, Valarie; Berry, Leonard L. (1988). "SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality". Journal of Retailing. 62 (1): 12–40.
  3. Babakus, E.; Mangold, W. G. (1992). "Adapting the SERVQUAL Scale to Hospital Services". Health Services Research. 26 (6): 767–786. PMID 1737708.
  4. Parasuraman, A.; Zeithaml, Valarie; Berry, Leonard L. (1988). "SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality". Journal of Retailing. 62 (1): 12–40.
  5. Parasuraman, A.; Zeithaml, Valarie; Berry, Leonard L. (1988). "SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality". Journal of Retailing. 62 (1): 23–28.
  6. Parasuraman, A.; Zeithaml, Valarie; Berry, Leonard L. (1988). "SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality". Journal of Retailing. 62 (1): 37–40.
  7. Mauri, A.; Minazzi, R.; Muccio, S. (2013). "A Review of Literature on the Gaps Model on Service Quality". International Journal of Quality and Service Sciences.
  8. Zeithaml, Valarie A.; Berry, Leonard L.; Parasuraman, A. (1988). "Communication and Control Processes in the Delivery of Service Quality". Journal of Marketing. 52 (2): 35–48.
  9. Zeithaml, Valarie A.; Berry, Leonard L.; Parasuraman, A. (1988). "Communication and Control Processes in the Delivery of Service Quality". Journal of Marketing. 52 (2): 35–48.
  10. Parasuraman, A.; Berry, Leonard L.; Zeithaml, Valarie A. (1993). "Understanding Customer Expectations of Service". Marketing Management. 2 (1).
  11. Parasuraman, A.; Zeithaml, Valarie; Berry, Leonard L. (1988). "SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality". Journal of Retailing. 62 (1): 12–40.
  12. Parasuraman, A.; Zeithaml, Valarie; Berry, Leonard L. (1988). "SERVQUAL: A Multiple-Item Scale for Measuring Consumer Perceptions of Service Quality". Journal of Retailing. 62 (1): 12–40.
  13. "LibQUAL+". Association of Research Libraries. Retrieved 2026-05-21.
  14. Teeroovengadum, V.; Kamalanabhan, T. J.; Seebaluck, A. K. (2016). "Measuring Service Quality in Higher Education: Development of a Hierarchical Model (HESQUAL)". Quality Assurance in Education.
  15. Babakus, E.; Mangold, W. G. (1992). "Adapting the SERVQUAL Scale to Hospital Services". Health Services Research. 26 (6): 767–786. PMID 1737708.
  16. Hume, J.; Mort, G. (2008). "ARTSQUAL: A Tool for Developing Quality Standards in Arts Organizations". Journal of Nonprofit & Public Sector Marketing.
  17. Buttle, Francis (1996). "SERVQUAL Revisited: A Critical Review of Service Quality". European Journal of Marketing. 30 (1): 8–32.
  18. Bolton, Ruth N.; Drew, James H. (1991). "A Multistage Model of Customers' Assessments of Service Quality and Value". Journal of Consumer Research. 17 (4): 375–384.