People often ask me about which methodology I use to drive the migration to the cloud of IT systems.
In fact, the methodology I use is a public one. It has been published in 2011 by Vivek Kundra (former Federal CIO) and is simply called "FEDERAL CLOUD COMPUTING STRATEGY".
This document cannot be found online but I kept it for you, it's here :
It's 32 pages, and it's very easy to read.
It first explains the expected benefits of the cloud and then proposes a concrete approach to structure the migration.
A must read!