Cloud computing has a number of different implementation models. An implementation model is a specific method of providing a service. In the case of cloud computing these are unique methods of implementing a cloud computing service. Implementation models often have particular characteristics that suit them to appropriate workloads. The most commonly used three-cloud implementation models are:
• Private cloud: Created and run internally by an organization or purchased and stored within the organization and run by a third party
• Hybrid cloud: Outsources some but not all elements either internally or externally
• Public cloud: No physical infrastructure locally, all access to data and applications is external
The concerns for revamping ITIL service processes mainly exist when the public or private cloud is hosted with third