In addition to the sectoral-level service quality model, we develop an aggregation model for computing the overall service quality index (Figure 38). This model is modified from the aggregation model of the tourist satisfaction index (Figure 2). Since service quality and customer satisfaction are conceptually consistent, a number of studies, especially those dealing with service quality measures, have treated service quality as one of the antecedents of customer satisfaction (Anderson & Fornell, 2000; Fornell et al., 1996). These studies include the American Customer Satisfaction Index (ACSI) model in which perceived quality is one of the three antecedents of customer satisfaction in addition to customer expectation and perceived value. Yet Iacobucci, Ostrom, and Grayson (1995) argue that service quality and customer satisfaction are theoretically distinct as they have different antecedents.