16 International Journal of Cloud Applications and Computing, 2(1), 16-40, January-March 2012 Copyright © 2012, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Copyright © 2012, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Keywords: BIaS Case Studies, Business Integration as a Service (BIaS), Cloud Computing, Risk Analysis as a Service (RAaaS), ROI Measurement as a Service (RMaaS) 1. INTRODUCTION Cloud Computing is transforming the way many organisations work and offers added values for operation management and service computing. Researchers have demonstrated the positive impacts it can offer for business engineering and service level management (Amburst et al., 2009; Brandic et al., 2009; Buyya et al., 2009). Amburst et al. (2009) identified cost reduction in IT services from using Cloud Computing. They also presented their Cloud Computing economics and ten major challenges for Cloud Computing. They emphasise a shift of risk from maintaining data centres and the capital costs of running them to the loss of data while managing Clouds. Buyya et al. (2009) assert that Cloud Computing offers billing-based Service Level Agreements (SLA) which can be used for op- erational management offering cost-savings and streamlining business activities and processes. In addition, Cloud Computing offers a variety of other benefits including agility, resource consolidation, business opportunities and green IT (Foster et al., 2008; Weinhart et al., 2009; Schubert, Jeffery, & Neidecker-Lutz, 2010; Business Integration as a Service Victor Chang, University of Southampton and University of Greenwich, UK Robert John Walters, University of Southampton, UK Gary Brian Wills, University of Southampton, UK ABSTRACT This paper presents Business Integration as a Service (BIaS) which enables connections between services operating in the Cloud. BIaS integrates different services and business activities to achieve a streamline pro- cess. The authors illustrate this integration using two services; Return on Investment (ROI) Measurement as a Service (RMaaS) and Risk Analysis as a Service (RAaaS) in two case studies at the University of Southampton and Vodafone/Apple. The University of Southampton case study demonstrates the cost-savings and the risk analysis achieved, so two services can work as a single service. The Vodafone/Apple case study illustrates statistical analysis and 3D Visualisation of expected revenue and associated risk. These two cases confrm the benefts of BIaS adoption, including cost reduction and improvements in effciency and risk analysis. Implementation of BIaS in other organisations is also discussed. Important data arising from the integration of RMaaS and RAaaS are useful for management of University of Southampton and potential and current investors for Vodafone/Apple. DOI: 10.4018/ijcac.2012010102