The Service Lifecycle is an approach to IT Service Management that emphasizes the importance of coordination and control across the various functions, processes and systems necessary to manage the full lifecycle of IT services. The Service Management Lifecycle approach considers the strategy, design, transition, operation and continual improvement of IT services.
The Service Lifecycle is described in a set of five publications within the ITIL Core set. Each of these publications covers a stage of the Service Lifecycle.
1. Service Strategy (SS)
2. Service Design (SD)
3. Service Transition (ST)
4. Service Operation (SO) and
5. Continual Service Improvement (CSI).
The term ‘continual’ is used in preference to ‘continuous’ to emphasize that this activity is not performed on a constant basis, but as a series of planned and controlled actions.
The picture below shows how these activities are connected to one another. Together they form the ITIL CORE.
Service Strategy is the hub around which everything revolves. Strategy drives all the decisions that are subsequently taken. Design, Transition and Operation are the more iterative cyclic activities. At all stages throughout the lifecycle, opportunities arise for improvement.
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