According to Kotler (2001), the level of satisfaction is the state of one's feelings derived from the comparison of results obtained from the product / service with his or her expectations. The expectation here is considered the wishes or expectations of the people. It originates from personal needs, previous experience and external information, such as advertising, word of mouth information of friends, family ...
Thus, the level of satisfaction is a function of the difference between the results received and expectations. Customers can feel a degree of satisfaction in the following three: If worse performance than expected, customers will not be satisfied. If performance matches expectations, the customer will be satisfied. If actual results exceeded expectations, customers are very satisfied and excited.
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