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This article aims at analysing the operational performance of Brazilian airlines from 2007 to 2010, by using a three-stage network Data Envelopment Analysis (DEA) model. Network DEA models define each production unit as a network of stages, providing a greater insight into the causes of inefficiency, as well as the decomposition of the global efficiency into individual scores for each internal stage. Instead of grounding the network DEA model on a radial measure of efficiency, we apply a slacks-based measure metrics. Each stage has been assumed to exhibit variable returns-to-scale, since scale effects cannot be neglected. The analysis resulted in nine globally efficient airlines. The division of the production process in stages made it easier to identify the sources of inefficiency. For instance, regarding the inefficient airlines, six were efficient in at least one stage.

AVALIAÇÃO DA EFICIÊNCIA DAS COMPANHIAS AÉREAS BRASILEIRAS UTILIZANDO UM MODELO DEA EM REDE BASEADO EM FOLGAS