Quality of service is defined by many different ways depending on the object of study and research environment. Quality of service is a service level that meets the needs and expectations of customers (Lewis & Mitchell, 1990; Asubonteng 1996; Wisniewski & Donnelly, 1996). Edvardsson, Thomsson & Ovretveit (1994) suggested that quality service is the service meets the expectations of our customers and satisfy their needs. According to Parasuraman et al (1985.1988), quality of service is the gap between customer expectations and their awareness when using the service through
satisfying Count: Services designed to meet customer need. Therefore, the quality of service necessary to meet customer needs and requirements of the customer taken as a basis for improving service quality. If customers feel that quality of service does not meet their needs, they will not be satisfied with the quality of service they received
Count supply: The quality of service associated with the process of implementation / transfers service to customers. Therefore, service deployment, service manners and how service providers will determine the quality of good or bad service. These are elements inside depends on the expression of the service provider. Therefore, to improve quality of service, service providers first need to know to improve internal factors to create long-term strength of his own in the provision of services to customers
Up characteristic of the product: The quality of service is overall the most essential aspects and essence crystallized in products and services created to characterize the product or service. So the service or product quality will contain many features superior service than a low level. This distinction associated with the identification of superior attributes of tangible or intangible products and services. It is because of these characteristics that customers can identify the quality of other business services with competitors. However, in practice very difficult to identify the core characteristics of the service adequately and accurately. Therefore, these characteristics do not have absolute value, only relative enables service quality perception in specific cases is easier
Count formidable: For customers, service quality service quality is demonstrated by its superiority compared to other products. The main features of this remarkable service makes quality become competitive strength of the service provider. It must be added that the assessment of the superiority of service quality is influenced greatly by the comments from the person receiving the service. This relationship has great significance for the assessment of service quality from customers in marketing activities and studies of customer satisfaction.
As of creating value: quality of service associated with the value created to serve customers. Service does not produce any value, they may be viewed as no quality. So considering the quality of service or more specifically, the value of giving customers depend on the evaluation of the customer and not the business. Usually customers receive the services bring value and compare them with what they expect to receive. In other words, the value of the services are also affected by many factors outside (customers) rather than internal (corporate). Service is a service of high quality to create value not only meet customer needs but also to beyond the customer's wishes and make your business stand out more than the competition. Therefore, the value creation is the basic characteristics and are the foundation for building and developing the quality of business services
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