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The opportunity offered by digital technologies to make deep rationalization in purchase of supplies is becoming indispensable in competition between enterprises, considering positive effects in reducing the costs of the companies that have adopted the E-Procurement. As it has been confirmed by numerous case studies, automation of procedures for the purchase through e-procurement technology enables companies to achieve a reduction in costs (average 8-12%) of total purchases. So web-based modelsdoi:10.1016/j.ieri.2014.03.003 fatcat:wyunsn6b6vaslnjcava7zs7noa