Does the Cloud lend itself to a solid business case? That thinking led me to this white paper which provides mathematical proof of a Cloud business case. You could possibly use to create ROI / TCO models. To request the white paper pls fill out this contact form and I will mail you the white paper ASAP.
In the emerging business model and technology known as cloud computing, there has been
discussion regarding whether a private solution, a cloud-based utility service, or a mix of the two
is optimal. The white paper examines the conditions under which dedicated capacity, on-demand
capacity, or a hybrid of the two are lowest cost