What is the most significant change in ITIL version 3?
Undoubtedly the single greatest change to ITIL in the new version is the life-cycle perspective. ITIL has evolved from a function-based library containing more than 40 books in version 1, via a process-oriented library with some indications of the necessity of the life-cycle perspective (read Application Management) in version 2 to a complete life-cycle oriented view of services in version 3.
Another result of the ITIL Refresh is that a far better integration between the different books is coming into place. I think that this is very important for ITIL to remain a tool of choice for all the professionals out there that have read the existing books over and over again and found some inconsistencies between them and already see ITIL as an integrated library.
Regards, David :-)