Service is process consists of a set of activities more or less intangible. Service is activity or benefit offers one party to other party. Supply of high quality product and services to customers a continuous basis, makes creating higher competitive advantages such as competitive barriers, increase customer loyalty, production and supply differentiated products, reduce marketing costs and determine higher prices for companies. Service quality is a very mental. Service organizations have been realized this for maintain their customers and gain competitive advantage, one of the key issues that must be considered is improve their quality of services. Providing continuous high quality service is one of basic ways that an services organization can do differentiate itself from other competitors. (Sehat et al. 2012)

Service is process consists of a set of activities more or less intangible. Service is activity or benefit offers one party to other party. Supply of high quality product and services to customers a continuous basis, makes creating higher competitive advantages such as competitive barriers, incre...