Input congestion, technical ineciency and output reduction in fuzzy data envelopment analysis

Document Type: Research Articles


Department of Mathematics, Faculty of Science, Lorestan University, Khorram Abad, Iran.


During the last years, the concept of input congestion and technical ineff-
ciency in data envelopment analysis (DEA), have been investigated by many
researchers. The motivation of this paper is to present models which obtain the
decreased output value due to input congestion and technical ineciency. More-
over, we extend the models to estimate input congestion, technical ineciency
and output reduction in fuzzy data envelopment analysis, by using the concept
of α-cut sets.

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