Cárdenas Estrada, R., Perez Pin, M., Tejada Solórzano, A. and Cevallos-Torres, L. 2019. 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. Ecuadorian Science Journal. 3, 1 (Mar. 2019), 15-22. DOI:https://doi.org/10.46480/esj.3.1.23.