To gather information on the expectations and perceptions of consumers, the researchers conducted a survey in order to offer a complete system scales better. For example, the survey asked about the expectations of consumers in a particular sector, classified according to the scale of 1 to 10, 10 being completely agree, one is absolutely opposed. Then, with a similar classification system, this time asking about the consumer's perception of the service. There are two systems above, we can calculate the degree of difference between feeling and expectations of consumers. Repeat this process with 90 other couples evaluation questions.
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