SERVQUAL model (see Figure 4) enables to determine the discrepancy among customer s expected service and perceived service. The discrepancy is called the gap .Parasuraman s, Zeithaml s and Berry s(1988) model was elaborated for evaluation of the situation perceived service quality, which was defined as customer' s opinion about common product s or service s ability of meeting customer s needs or expectations (Hopeniené, Ligeikiené,2002).