fa Mathematical Modeling and Applications of OR Mathematical Modeling and Applications of OR پژوهشی Original <em>Resource allocation is a problem that commonly appears in organization with a centralized decision making (CDM), who controls the units. The aim of central decision making is to allocate resources in such a way that the organization get the most benefit. Some Data Envelopment Analysis (DEA) researchers presented DEA-based resource allocation models by paying attention to energy saving and environmental pollution reduction. In this paper, we expanded a resource allocation model for 25 branches of an Iranian Tejarat bank, so that determined how much decision making (DM) can save on energy and manpower hours, so that undesirable outputs like non-performing loans are significantly reduced in a way that achieve the minimum reduction of desirable outputs while unchanged the performance of each unit after re-allocation. The result of the implementation of the model shows that in total with a 10</em><em>%</em><em> and 23</em><em>%</em><em> reduction in staff and costs respectively can result in the 0.09</em><em>% </em><em>reduction of deposits and 56</em><em>%</em><em> of non-performing loans.</em> resource allocation, data envelopment analysis, energy saving 63 75 http://iors.ir/journal/browse.php?a_code=A-10-1422-4&slc_lang=fa&sid=1 S. Madadi سیما ممدی sima.madadi@gmail.com 1111111111 1111111111 Yes Islamic Azad University, Tehran دانشگاه آزاد اسلامی - تهران F. Hosseinzadeh Lotfi فرهاد حسین زاده لطفی farhad@hosseinzadeh.ir 1111111111 1111111111 No Islamic Azad University, Tehran دانشگاه آزاد اسلامی - تهران M. Rostamy-Malkhalifeh محسن رستمی Mohsen_rostamy@yahoo.com 1111111111 1111111111 No Islamic Azad University, Tehran دانشگاه آزاد تهران M. Fallah jelodar مهدی فلاح جلودار Mehdi.fallah_jelodar@yahoo.com 1111111111 1111111111 No Islamic Azad University, Amol دانشگاه آزاد اسلامی آمل