Resumo

SOLANA-IBANEZ, José. Obtaining a ranking of productive units through Data Envelopment Analysis. Innovar [online]. 2011, vol.21, n.39, pp.23-38. ISSN 0121-5051.

This work considers the problem of obtaining a ranking of productive units in the context of the nonparametric technique of Data Envelopment Analysis (DEA). It focuses on superefficient modeling (SDEA) according to the proposal by Andersen and Petersen (1993); based on their work, attempts have been made to improve the capacity for discrimination of DEA. The main problems are analyzed, particularly the infeasibility of the SDEA model and the solutions provided from that field, as well as the additional usefulness of SDEA modeling to obtain information on the identity of each evaluated unit. A preliminary contribution inherent to this work indicates that where infeasibility impedes a coherent ranking, the ordinal classification of the units as a function of their status and their SDEA coefficient can serve as a replacement. Finally, an illustrative example serves to introduce a possibility that had not been considered in other works: SDEA modeling applied to global models. The results indicate that in general we may expect greater homogeneity in the classification obtained in each model.

Palavras-chave : efficiency; data envelopment analysis; DMU ranking; super efficiency.

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