M Rostamy Malkhalifeh - Department of Mathematics, Science and Research Branch, Islamic Azad University, Tehran, Iran
F Sultanmohammadi - Department of Mathematics, Science and Research Branch, Islamic Azad University, Tehran, Iran

The purpose of this study is to use integer data in the data envelopment analysis (DEA) model. In the first stage, we introduced a radial model in which the image was an integer point. Next, we applied this concept to non-radial models. Finally, we used a numerical example with the integer data which indicated the importance of this concept

Data envelopment analysis (DEA), Integer efficiency, Integer additive, Integer SBM, Integer data.