Document Type: Research Articles
Department of Mathematics , Science and Research Branch, Islamic Azad University,Tehran, Iran.
In many applied programs in real-life problems, both physical inputs and out-
puts are heterogeneous which in this case the efficient cost and income model
can not apply to evaluate the cost and income of related turnover. So, a mea-
surement based on the directional value of prot was presented which we have
developed it in this paper and have computed it for interval data. In fact, we
have measured the inefficiency of cost in the presence of interval data using the
directional distance function which is most meaningful for those companies
that their essential behavioral goals are maximizing the prot with least am-
ambiguity. To this end, considering some branches of Tejarat bank in Iran, the
efficiency of profit in presence of interval data is computed by means of the
distance directional function.