Despite constant growth of service economy there exist different approaches which mainly provide different perspectives toward the definition of service and have proposed service realization methods, technologies, productivity, quality measurement and innovation in services merely as areas for further research. One of the most important factors which influence this fact is the multidisciplinary nature of this field of study and its wide variety. While in some Industries service is observed as a component of the product-service bundle, in other it can be seen as an autonomous unit. Regardless of the context in which service is being provided and the discipline through which the service is being studied, knowledge is of the essence for using and providing services. However, the need for a multi-perspective analysis of "required knowledge for realizing services" is still immense. Â© 2009 Springer-Verlag Berlin Heidelberg.