Platform as a Service (PaaS): In this model, the integrated development environment tools are provided to develop own business policy. Cloud developer develops the application and run it in cloud environment to supply the customers. A predefined configuration of operation system and application server are delivered to cloud users. For an example, Force.com and Google's App Engine are providing as platform [37].

): In this model, the integrated development environment tools are provided to develop own business policy. Cloud developer develops the application and run it in cloud environment to supply the customers. A predefined configuration of operation system and application server are delivered to cloud users. For an example, Force.com and Google's App Engine are providing as platform.