According to the Best practice of delivering the IT services, 5 phases are included in the Service Life-Cycle which are:



1- Service Strategy
at this stage the overall objectives and vision of the services is laid down, which must contain clear understanding of the customers needs and the customers scope.


2- Service Design
design services to meet agreed business outcomes,design processes to support the service lifecycle, identify and manage risks, design secure and resilient IT , infrastructures, environments, applications and data/information resources and capability, design measurement methods and metrics, produce and maintain plans, processes, policies, standards, architectures, frameworks and documents to support the design of quality IT solutions, develop skills and capability within IT and contribute to the overall improvement in IT service quality.


3- Service transition
implementing all aspects of the service, not just the application and how it is used in ‘normal’ circumstances. It needs to ensure that the service can operate in foreseeable extreme or abnormal circumstances, and that support for failure or errors is available.


4- Service Operation
deliver agreed levels of service to users and customers, and to manage the applications, technology and infrastructure that support delivery of the services.


5- Continual Service Improvement (CSI)
concerned with maintaining value for customers through the continual evaluation and improvement of the quality of services and the overall maturity of the ITSM service lifecycle and underlying processes.