Efficiency measurement of two stage processes with shared inputs and outputs by DEA An application on Malaysian Palm Oil refineries

ALI ASHRAFI
2016 Fifth International Conference On Advances in Applied Science and Environmental Engineering - ASEE 2016   unpublished
In recent years, a great number of Data Envelopment Analysis (DEA) studies have focused on Decision Making Units (DMUs) with two-stage structures, where all outputs from the first stage are intermediate products that are applied as the inputs of the second stage. In many situations, some inputs and outputs are shared between two stages. For this type of two-stage process, the conventional two-stage DEA models have some limitations e.g. efficiency formulation and linearizing transformation. In
more » ... is paper, we introduce a relational DEA model for the two-stage process with shared inputs and outputs that the overall efficiency is illustrated as a convex combination of efficiencies of its two stages. The linearity of DEA models is preserved in our model. A numerical example of Malaysian Palm Oil refineries is used to explain the model. Keywords-data envelopment analysis; efficiency; two-stage; intermediate product; shared inputs and outputs. I. given DMU. The ratio DEA model that is also known as the CCR model for evaluating the relative efficiency of DMU o can be indicated as follows:
doi:10.15224/978-1-63248-086-6-59 fatcat:durylwf6jbgstj5ufsknet2jhy