71 Journal of Sustainable Development in Africa (Volume 12, No.1, 2010) ISSN: 1520-5509 Clarion University of Pennsylvania, Clarion, Pennsylvania AUTOMATED TELLER MACHINE AND ELECTRONIC PAYMENT SYSTEM IN NIGERIA: A SYNENTHESIS OF THE CRITICAL SUCCESS FACTORS By: O. T. Ebiringa ABSTRACT This study investigates the effects of ATM infrastructure on the success of e-payment. The study is motivated by the apparent low level of satisfaction with the level of the e-payment services irrespective of the increased deployment of ATM by banks and the need to isolate the critical factors responsible for this. In carrying out the study, banks that are on the interswitch network formed the population. The analysis is based principally on primary data collected from users of the ATMs. A total of one thousand, one hundred and forty-one users of ATM were sampled. Weighted scores of their responses to success factors identified in the literature were analysed using the Factor analysis simulation model. Five strategic decision clusters were modeled, in which inadequate availability of quality infrastructure was identified as the most critical limition to efficient e-payment system via ATMs. The conclusion therefore is that provision of adequate infrastructure such as power is critical for effective integration of the Nigerian banking system to the global network of electronic payment via ATMs, however for this to be possible, concerted effort must be made by stakeholders to resolve the lingering crisis in the energy sector. Key words: e-payment, ATM, infrastructure, eigenvalue, principal component, varmax rotation.