in this research, interval efficiency of butchery units of zabol city using model of interval data envelopment analysis was measured, and factors of effective on it was studied. data for this research obtained via completing questionnaires and use of method of sampling randomized for 2010 years. the results showed that efficiency maximum of 50% of butcheries is less than 40% and efficiency mini...

Data Envelopment Analysis (DEA) is a mathematical programming-based approach for evaluates the relative efficiency of a set of DMUs (Decision Making Units). The relative efficiency of a DMU is the result of comparing the inputs and outputs of the DMU and those of other DMUs in the PPS (Production Possibility Set). Also, in Data Envelopment Analysis various models have been developed in order to...

Traditional data envelopment analysis (DEA) models evaluate two-stage decision making unit (DMU) as a black box and neglect the connectivity may exist among the stages. This paper looks inside the system by considering the intermediate activities between the stages where the first stage uses inputs to produce outputs which are the inputs to the second stage along with its own inputs. Additional...