Multi-Tenancy in SaaS (Software as a Service) architecture is the concept leveraging cloud computing and virtualization which incurs cost efficiency. Modularity and customizability enhances the strength of multi-tenancy and business opportunities. With the growing business and competition, there arises a need to introduce an IT based technology to the system. Business process re-engineering and development of Enterprise Resource Planning (ERP) has revolutionized the way an enterprise system is build and executed and even more exponentially revolutionized with the introduction of multi-tenancy integrated with SaaS-based ERP system. The proposed architecture introduces the concept of fully modular system, where different modules can be implemented and configured according to the necessities of the user and further improved based on the requirements avoiding the related concerns.

1. Nitu, "Configurability in SaaS (software as a service) applications," in Proceedings of the 2nd India software engineering conference Pune, India: ACM, 2009.
2. S. Merkel, "Parallels Software as a Service (SaaS)," p. 2.
3. ComputerWeekly. com, "The Computer Weekly guide to Cloud Computing," 2010.
4. F. Chong and G. Carraro, "Architecture Strategies for Catching the Long Tail," Microsoft Corporation, 2006.
5. F. Chong, G. Carraro, and R. Wolter, "Multi-Tenant Data Architecture," Microsoft Corporation, 2006.
6. A. Azeez, S. Perera, D. Gamage, R. Linton, P. Siriwardana, D. Leelaratne, S. Weerawarana, and P. Fremantle, "Multi-tenant SOA Middleware for Cloud Computing," Cloud Computing,
7. R. Mietzner, T. Unger, R. Titze, and F. Leymann, "Combining Different Multi-tenancy Patterns in Service-Oriented Applications," Enterprise Distributed Object Computing Conference, IEEE
8. J. Jing and J. Zhang, "Research on Open SaaS Software Architecture based on SOA," in 2010 International Symposium on Computational Intelligence and Design, Hangzhou, 2010, pp. 144
9. B. Gao, D. C. J. Guo, Z. H. Wang, W. Hao, and D. W. Sun, "Develop and Deploy Multi-Tenant Web-delivered Solutions using IBM middleware: Part 3: Resource sharing, isolation and customization in the single instance multi-tenant application," IBM, 2009.
10. Amelia Maurizio, James Sager, Peter Jones, Gail Corbitt, Lou Girolami, "Service Oriented Architecture: Challenges for Business and Academia", Proceedings of the 41st Hawaii
11. John Fontanella, "B2B E-Business in the Supply Chain: New Services and Technologies Require Companies to Re-evaluate their Strategies", AMR Research, May, 2008.
12. Frederick Chong, Gianpaolo Carraro, and Roger Wolterh http://msdn. microsoft. com/en-us/library/aa479069. aspx, June 2006. Frederick Chong, Gianpaolo Carraro, and Roger Wolterh http://msdn. microsoft. com/en-us/library/aa479086. aspx, June 2006

Multi Tenancy Cloud Computing Modularity Saas Architecture Customizability Extensibility Erp