To evaluate a DMU’s efficiency for both models might be helpful, but it does not always capture the essential issues at stake. The right choice of a DEA model-CCR or BCC-often, if not always, is a difficult decision. (Manag Sci 30:1078–1091, 1984) are the most popular approaches of measuring efficiency among a group of decision making units, DMUs, in data envelopment analysis, DEA. (Eur J Oper Res 2:429–444, 1978) together with the BCC model by Banker et al.