The decrement of input proportions in DEA model is associated with its input reduction. This
reduction is apparently good for economy since it could reduce unnecessary cost resources.
However, in some situations the reduction of relevant inputs such as labour could create
social problems. Such inputs should thus be maintained or increased. This paper develops
an advanced radial DEA model dealing with mixed integer linear programming to improve
integer output values through the combination of inputs. The model can deal with real input …