KBArticle

The OpsMgr 2007 R2 Sizing Helper is an interactive document designed to assist you with planning & sizing deployments of Operations Manager 2007 R2. It helps you plan the correct amount of infrastructure needed for a new OpsMgr R2 deployment, removing the uncertainties in making IT hardware purchases and optimizes cost. A typical recommendation will include minimum hardware specification for each server role, topology diagram and storage requirement.

For more information and to download the tool see:

http://blogs.technet.com/momteam/archive/2009/08/12/operations-manager-2007-r2-sizing-helper.aspx