Suryani2019-09-252019-09-252016-03-252014-07http://hdl.handle.net/20.500.12424/235999The aim of this study is to determine and identify the factors forming quality of service in PT. Bank Muamalat Indonesia, Tbk Branch Medan. The instruments of this research use questionnaires and factor analysis. This research is quantitative research using survey methods. The sample method used in this research is accidental sampling. The reliability and validity test shown that 13 question had been fulfilled the reliability and validity requirements. The extraction gives three factors. Factor 1 explained 45,299%, factor 2 explained 12,819%, and factor 3 explained 8,904%. The results show that quality of communication is dominant factor to explain service quality, then product innovation and physical aspects.indWith permission of the license/copyright holderFactor AnalysisIslamic BankingService QualityEconomic ethicsEthics of economic systemsLabour/professional ethicsMethods of ethicsJournal volume