ITIL Practitioner is primarily based on the ITIL Practitioner publication, which is a new Official ITIL title that provides complementary “how to” guidance to the “what and why” guidance contained in the ITIL Foundation course and the Continual Service Improvement (CSI) publication. The Official ITIL Practitioner publication complements, and does not overlap the contents in ITIL core publications, adding practical “how to” detail on adopting and adapting ITIL to make improvements that deliver business value.