The public and private service sector shows some specificity that classical measurement and benchmarking instruments normally fail to serve. Missing prices for public goods or distinct firm-specific solutions to the same problem - and, thus, different production techniques - are only two of the frequently arising problems. This volume emphasizes the possibilities to adjust and develop the methodology of Data Envelopment Analysis in order to meet the requirements of the service sector and highlights the widespread application of the instrument - especially to problems the orthodox methods fail to solve or to emerging fields within the service sector.