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The Service Design Key Element Guide is a handy reference guide to the core Service Design publication. It discusses ITIL and its evolution and the need for the Service Lifecycle approach. The title examines what is meant by best practice framework, how this relates to 'common practice', and what compliance means. The main focus of the Key Element Guide is to provide an overview of the principles, objectives, and key elements and practice of Service Design as well as discussing the 5 aspects of design, the service design process elements and how to define service level requirements.