The deregulation of the Brazilian aviation industry started in the early 1990s. It created a new scenario of competition for the existing carriers, forcing them to change their way of dealing with this type of market. This led to a new flying concept - the Low Cost Carriers (LCCs). Before the beginning of the LCCs operation, there were only Full Service Carriers (FSCs). In order to ensure their competitiveness, other companies were forced to seek a better use of its resources. This paper analyses - through the Fuzzy DEA model, which takes into account the poor quality of the available data - the performance of the Brazilian airlines from 2001 to 2005. Moreover, since there are many DMUs tied in this approach, a model to increase discrimination for Fuzzy DEA models was suggested. The temporal data to assess the evolution of airlines facing the new competitive scenario in the market was analysed.
Air transport; Efficiency; Data Envelopment Analysis; Fuzzy sets
