ITIL Version 3's (V3) service lifecycle-based practice incorporates the best of V1 and V2 and tests current best practice for ITSM. In order to meet the current and future business requirements, Service Design provides guidance on the production and maintenance of IT policies, architectures, and documents for the design of appropriate and innovative IT infrastructure service solutions and processes.
I have really enjoyed it. Concepts are easier to understand that Service Strategy and one can easily identify the relation and points of overlapping between the different processes.
A must-read to pass the Service Design exam. My exam is due in 5 days, hope it will help me to pass J