Cárdenas Estrada R, Perez Pin M, Tejada Solórzano A, Cevallos-Torres L. Application of a hybrid model of Theory of Tails and Evolutionary Algo-rithm to measure the optimization in the service of attention to the client in a place of fast food. Ecuad. Sci. J. 2019;3(1):15-22. doi:10.46480/esj.3.1.23