SAP BusinessObjects Business Intelligence platform
Base sizing using SAP tools; Architectural requirements such as High Availability, your companies server sizes (sometimes these are in set configurations); Configuration including the APS; Much of this pulls together freely available resources but (hopefully) in a structured and methodical manner.
Please also refer to the
BI Sizing Microsite.
SAP BusinessObjects BI4 Sizing and Deployment
Attached is a presentation I made on Sizing from the UK SAP User Group Conference in November 2013. For sizing you need to consider: