+ 0 Votes that's nice Dr Dij 7 years ago and a good idea but isn't this topic covered by ITIL somewhere? + 0 Votes Good comment guy 7 years ago ITIL is a framework that defines the different process for IT. However, you find nothing about how to size LANs, how to architecture infrastructure for IP telephony, etc. The idea is to go deeper. It is also not limited to IT.