After integrating VMM with Operations Manager for monitoring, you can also enable the integration to provide reporting, which will give you the ability to create and view reports related to Hyper-V servers, VMs, and VMM-related components (for example, the management and library servers).
In order to enable reporting, you will need to have SQL Server Analysis Service (SSAS) preinstalled on the Operations Manager Reporting server (for example, lab\w2012-scom).
You also need to install Analysis Management Objects (AMO) on all of the VMM management servers for the SQL Server version you have installed. For SQL 2012 SP1, refer to http://www.microsoft.com/en-us/download/details.aspx?id=35580.