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The original version of this article unfortunately contained an error. authors would like to correct the error with erratum.

In the evaluation of non-efficient units by Data Envelopment Analysis (DEA) referenced Decision Making Units (DMU’s) have an important role. Unfortunately DMU’s with extra ordinary output can lead to a monopoly in a reference set, the fact called abnormality due to the outliers' data. In this paper, we introduce a DEA model for evaluating DMU’s under this circumstance. The layer model can resul...

Unfortunately, there is a word error in the title of original publication paper. We apologize for our mistake.

The original version of this article unfortunately contained a mistake. presentation equations was incorrect. corrected are given below.

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During the correction process unfortunately author photos in biography section have been interchanged. The biographies should be as follows

The publication of this article unfortunately contained mistakes. name one the authors was not correct. corrected is given below.