In its third round of tariff review, the Brazilian Electricity Regulatory Agency (Aneel) adopted a methodology based on data envelopment analysis (DEA) to define efficient levels of operational expenditure. This work presents proposals to improve Aneel's methodology. In particular, we propose the segmentation of the set of distribution utilities using cluster analysis techniques to establish fair comparisons between utilities. Additionally, we propose a cross evaluation model using the definition of efficient operational expenditure levels to achieve an efficiency index that accounts for peer evaluations.
Electric power; Data Envelopment Analysis; Cross evaluation; Cluster analysis
