In previous SUP/SMP versions there was a Sizing Guide available, which could be used. With SMP3 the official answer to sizing questions is the “SAP Quicksizer”. This is a sizing tool, which is used already for different SAP products. With the relase of SMP3.0 it got enhanced to also support sizing of SAP Mobile Platform (OData and Mobiliser) scenarios.
In the following article I will give some hints and information on SMP3 sizing. The article got published in SAP Mobile Platform Developer Center