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Service Quality and Moments of Truth (SERVQUAL)

💼 Business By CampusDown Wiki Editorial Team Last updated
Quick answer: service quality is judged by the gap between what customers expect and what they perceive, and SERVQUAL measures it on five dimensions: tangibles, reliability, responsiveness, assurance and empathy. A 'moment of truth' is the brief encounter with staff or a touchpoint in which customers judge that quality.
Contents
  1. 1. Features of services
  2. 2. The gap model
  3. 3. SERVQUAL's five dimensions
  4. 4. Moments of truth
  5. 5. Criticism and use
  6. 6. References

Features of services

Services are intangible, produced and consumed simultaneously (inseparability), variable in quality (heterogeneity) and cannot be stored (perishability). Quality is therefore hard to check in advance and is decided at the encounter between customer and staff.

The gap model

Parasuraman, Zeithaml and Berry (1985) explained service-quality problems as five gaps.

  1. Customer expectations vs management's perception of them
  2. Management perception vs service-quality specifications
  3. Specifications vs actual service delivery
  4. Service delivery vs external communications (promises)
  5. Expected vs perceived service, the result of the first four gaps

SERVQUAL's five dimensions

  • Tangibles: facilities, equipment and staff appearance
  • Reliability: performing the promised service accurately
  • Responsiveness: willingness to help promptly
  • Assurance: staff knowledge, courtesy and ability to inspire trust
  • Empathy: individual attention and care

The 1988 scale asks 22 items for both expectations and perceptions and scores quality as perception minus expectation. This logic comes from expectancy-disconfirmation theory, but satisfaction is a judgment about one transaction, whereas service quality is a more enduring overall evaluation.

Moments of truth

In Moments of Truth (1987), Jan Carlzon, president of Scandinavian Airlines (SAS), argued that millions of customer contacts a year, each lasting about 15 seconds, decide a company's fate. He gave front-line staff authority, turned the organization around the customer interface and returned the loss-making SAS to profit. Because one failed contact can spoil the whole experience, the idea became a starting point for service blueprinting and customer-journey management.

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Criticism and use

SERVQUAL has been criticized for the reliability of difference scores, dimensions that vary by industry and vague expectation measures, prompting alternatives such as the performance-only SERVPERF. It is still widely used to diagnose quality in hospitals, banks, airlines and education, and good encounters spread through word of mouth. For the services marketing mix, see the marketing mix.

See also: Customer Relationship Management (CRM)

References

  1. Parasuraman, A., Zeithaml, V. A., & Berry, L. L. (1985). A conceptual model of service quality and its implications for future research. Journal of Marketing, 49(4), 41–50.
  2. 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.
  3. Carlzon, J. (1987). Moments of Truth. Cambridge, MA: Ballinger.

Reports and materials that use this theory (Korean)

There are no materials dedicated to this theory yet, but you can search related reports in the CampusDown library (Korean).

Find more reports · Search '서비스 품질과 진실의 순간' on CampusDown →
Expectancy-Disconfirmation Theory (Customer Satisfaction)Expectancy-disconfirmation theory explained: Oliver's model in which customers judge satisfaction by comparing expectations with perceived performance, positive and negative disconfirmation, assimilation and contrast effects, repurchase intention, and limits.💼 BusinessMarketing Mix (4Ps and 7Ps)The marketing mix: Borden's concept, McCarthy's 4Ps (product, price, place, promotion), Booms and Bitner's 7Ps for services (people, physical evidence, process), Lauterborn's 4Cs, and how to analyse a firm's mix.💼 BusinessWord-of-Mouth MarketingWord-of-mouth and viral marketing: Katz and Lazarsfeld's two-step flow and opinion leaders, electronic WOM, Jonah Berger's STEPPS, the power of negative WOM, influencer marketing and disclosure rules.💼 BusinessSWOT AnalysisSWOT analysis explained: strengths, weaknesses, opportunities and threats, the TOWS matrix, links with Porter's Five Forces and PEST, origins, criticisms, and how to write a SWOT report.💼 Business

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This article was last updated on October 15, 2026. It is based on widely recognized original works and textbooks; when citing it in a paper, please check the original sources listed in the references.