When determining this criteria then will proceed to the calculation to each criterion based on the conditions of implementation and ways of distribution. For example, to conduct a survey with a client waiting to buy items on the internet. From this customer's experience shows they do not always receive the item on time. In this case, the sense of service is lower than the expectations of customers and key differences that create a negative value. The company needs more effort to reach the expectations of the customers by improving service quality.The purpose of this method is intended to reduce to a minimum the gap between customer expectations and perceived reality. However, that also depends on company strategy to determine the most dominant criteria.
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