Without a doubt, one of the most important models to measure quality service is SERVQUAL’s scale, in which are resumed the models of differences between perceptions and expectations and the quality service five dimensions or Gaps; this scale is based on questionnaires applied to customers in a direct way, including quantitative and qualitative aspects grouped in five dimensions, which are represented in Table 1; that gives us a total of 22 statements that try to gather the expectations of an excellent service and the perceptions of the services received.