Service quality is a topic that is important to be discussed by practitioners and academicians that
related with service industry [1, 2]. This is because service quality has strategic roles [1, 2]. In a
mature service industry, service quality is an order qualifier that ensures a service company survives
[27]. In other words, service quality is a source of comparative advantage [27]. Meanwhile, in a
growth service industry, service quality is an order winner, that is a source of competitive advantage
[27].