The banking industry has been the object of DEA analyses by a significant number of researchers and probably is the most heavily studied of all business sectors. Various DEA models have been applied in performance assessing problems, and the banks' complex production processes have further motivated the development and improvement of DEA techniques. The main application areas for DEA in bank and branch performance analysis include the following: efficiency ranking; resource allocation, efficiency trends investigation; environmental impacts compensation; examining the impacts of new technology, ownership, deregulation, corporate, economic, and political events, etc.