Efficiency rating of decision making units (DMUs) was long back
identified as an important activity that helps both the producer and the
policy maker. It requires that the DMUs are in competition, produce
similar outputs combining similar inputs. Efficiency rating may be
oriented or non-oriented. Twenty banks were considered to study
efficiency variations pursuing 'output approach'. For given inputs,
outputs are radially projected onto the data envelopment frontier for
each decision making unit. Frontier output augmentation is not possible
for an efficient DMU, which is a commercial bank in the present context.
For inefficient decision making units peer lists exist and such a list
provides role models. In The present book primarily classify commercial
banks as efficient and inefficient and for inefficient banks it provides
'role models' that are always extremely efficient. Often economic data
are constrained by returns to scale and this study identified for each
commercial bank the sources of returns to scale as constant or
increasing or decreasing. 12 out of 20 banks are found to be scale
efficient and they do not experience output losses due to scale
inefficiency.