The notion of internal-service quality was first proposed by Sasser & Arbeit (1976), who considered employees as the internal customers. The so-called internal-service quality actually is applying a combination of such notions as marketing and service quality to the internal aspect of a business. The tangible quality of internal services involves personnel training, incentive programs and employee welfare measures, while the intangible quality involves the accessibility to an organization’s internal communication channels and/or the degree of autonomy for an employee exercising his authority on job