01297naa a2200193 a 450000100080000000500110000800800410001910000290006024500450008926000090013450000390014352007550018265300240093765300200096165300290098170000190101070000170102977300570104616595552015-03-30       2002    bl uuuu     u00u1 u    #d1 aMELLO, J. C. C. B. S. DE  aConstruction of a smoothed DEA frontier.  c2002  a(Edição especial de DEA e MCDA).  aIt is known that the DEA multipliers model does not allow a unique solution for the weights. This is due to the absence of unique derivatives in the extreme-efficient points, which is a consequence of the piecewise linear nature of the frontier. In this paper we propose a method to solve this problem, consisting of changing the original DEA frontier for a new one, smooth (with continuous derivatives at every point) and closest to the original frontier. We present the theoretical development for the general case, exemplified with the particular case of the BCC model with one input and one output. The 3-dimensional problem is briefly discussed. Some uses of the model are summarised, and one of them, a new Cross-Evaluation model, is presented.  aFronteira suavizada  aMétodo de Ritz  aRazões de compensação1 aLINS, M. P. E.1 aGOMES, E. G.  tPesquisa Operacionalgv. 22, n. 2, p. 183-201, 2002.