ITIL Version 2 & Version 3

IT Services to Business and ITIL:

Objective of IT is to support and deliver business focussed IT services.

ITIL Obj:
Reduce cost, Improve availability, Tune capacity, Increase throughput, Optimize resource utlization and Improve scalability.

ITIL version 2 and ITIL version 3 overview:

ITIL was developed by Office of Govt Commerence(OGC), an Office of UK Treasury.
ITIL version 2 has 8 books.

The eight ITIL version 2 books and their disciplines are:

The IT Service Management sets

1. Service Delivery
2. Service Support

Other operational guidance

3. ICT Infrastructure Management
4. Security Management
5. The Business Perspective
6. Application Management
7. Software Asset Management

To assist with the implementation of ITIL practices a further book was published providing guidance on implementation (mainly of Service Management):

8. Planning to Implement Service Management

And this has more recently been supplemented with guidelines for smaller IT units, not included in the original eight publications:

9. ITIL Small-Scale Implementation

IT Service management consisted of 10 processes and 1 function(service desk)
The far more widely used, circulated, and understood of ITIL v2 publications is IT Service Management.

In May 2007, this organization issued the version 3 of ITIL (also known as the ITIL Refresh Project) consisting of 26 processes and functions, now grouped under only 5 volumes, arranged around the concept of Service lifecycle structure.

1. Service Strategy
2. Service Design
3. Service Transition
4. Service Operation
5. Continual Service Improvement

For more detailed information, please visit-
http://en.wikipedia.org/wiki/Information_Technology_Infrastructure_Library

ITIL version 2 and version 3 difference:
For more detailed information on the difference, please visit
http://wiki.en.it-processmaps.com/index.php/Comparison_between_ITIL_V3_and_ITIL_V2_-_The_Main_Changes