International Journal of Systems and Service-Oriented Engineering, 1(4), 27-41, October-December 2010 27 Copyright © 2010, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Keywords: Composition Methods, Organizational Networks, Service Composition, Socio-Technical Systems, Web Services INTrODUcTION Organizations are more and more forced to collaborate with each other (Chiu, Cheung, & Zhuang, 2010), share information and reuse system components to reduce cost. The creation in organizational networks results in the cre- ation of flows that are no longer self-contained within a single organization. The performance depends more and more on the performance Demand-Driven Development of Service compositions in Organizational Networks Ralph Feenstra, Delft University of Technology, The Netherlands Marijn Janssen, Delft University of Technology, The Netherlands Sietse Overbeek, Delft University of Technology, The Netherlands AbSTrAcT Organizational collaborate more and more in organizational networks to remain competitive. New systems can be created by assembling a set of elementary services provided by various organizations. Several composi- tion methods are available, yet these methods are not adopted in practice as they are primarily supply-driven and cannot deal the complex characteristics of organizational networks. In this paper, the authors present a service composition development method and a quasi-experiment to evaluate this method by comparing it with existing ones. The development method is able to deal with incomplete information, to take the demand as a starting point, to deal with news services that do not exist yet, to include and to evaluate non-functional requirements, to show various stakeholder views, and to help to create a shared vision. Visualization and evaluation of alternative compositions and negotiation about the desired results are important functions of any composition method in organizational networks. of external partners that are often unknown. Whereas in the past each organization has developed applications independently of other organizations, the current development is to de- velop components only once and reuse them as services in the organizational network (Janssen & Joha, 2008). This has resulted into the trend of creating new systems as composites of web services (Liang, Huang, & Chuang, 2007). Web services technologies promise to create new business applications by composing existing services and to publish these applications as DOI: 10.4018/jssoe.2010100103