For many years’ organizations were used to owning assets (hardware/software) and using these assets to customize their workloads and deliver benefits of IT services for optimizing/automating business processes. But, as complexity grew over the years these organizations found out that the refreshing hardware, updating software and re training people is becoming costly affair. Meanwhile, the overall desire of reducing cost for IT expenses was growing strong. There were two obvious solutions to this problem, outsource people resources and outsource hardware costs. In order to address this issue product maker or third party providers offered "cloud" solution which offered pay per use model. Therefore, cloud services have evolved as pay-per-use (on going "rental costs only and no upfront capitol expenses required" model became really attractive for many buyers. In the IT industry swings between in house/outsource or own/rent expense mechanisms