A new analysis method of robust stability analysis was proposed for general applications. In this
method, the solution of the highest and lowest efficiency scores of each decision making unit (DMU) in an
interval data envelopment analysis (DEA) is obtained firstly to determine the interval efficiency score of
each DMU and classify DMUs. Then a so-called post-interval DEA model is built. Based on the optimum
solution of this model, an index figuring out the stability of maintaining the highest score is introduced. As
a result, the analysis of robust stability for interval DEA can be achieved. Finally, to explain the
application of this method, an example was given.