This paper examines the efficiency of commercial banks in Namibia using the standard econometric frontier approach. Although two aspects of efficiency (scale and scope) receive our attention, the emp Measuring the efficiency of decision making units A. CHARNES The University of Texas, Austin TX, U.S.A. W.W. COOPER Graduate School of Business Administration, Harvard University, Cambridge MA, U.S.A. and even many service operations. 2. Model and definition Our propo~d measure of the efficiency of any UMU is obtained as the maximum of a Monitoring Airport Operational Efficiency u define level of service criteria, performance standards, and their evaluation methodology u measure operational efficiency by observation and surveys under actual traffic conditions u The efficiency of emergency services can be evaluated through exercises u Operational efficiency deficiencies