Although ITIL has experienced a number of refinements over the years, it remains at its roots a set of publications that provides guidance for service management. It has emerged as the international de facto standard framework of best practices for IT service management. It is a public domain framework. It is not proprietary. You have to pay for the publications, but you do not have to pay to use them; you can apply them freely in your organization. It is a best-practice framework, and that means it is not an academic or theoretical view of how to manage IT services; it is actually culled from practitioners out in the field.
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