Process guidance for Microsoft infrastructure
I've been in the process world since Malcolm Baldridge, and application has always been significantly different than high level process theory. In the IT world, ITIL retains the masthead for process, leaving it to the individual organizations to figure out specific application and best practice.
Microsoft has for a few years, been putting together application specifics for its technology using ITIL as the high level under which to place specific practical guidance. This guidance is called the Microsoft Operational Framework, or (MOF).
It's worth a look at the MOF site for specific guidance split into the Change management, Optimization, Support, and Operating quadrants. In addition the site contains a self assessment for your organization to use, an executive summary, detailed level guidance, and even a reference server architecture.
Here's the site:
http://www.microsoft.com/technet/itsolutions/cits/mo/mof/default.mspx