Hello Bob
within ERP Retail there are 2 possibilities to replenish stores and DCs: the 'classic' MRP (which is not Retail specific but can be used by Retailers as well, typically for DCs) and Retail Replenishment (this is primarily for stores). Both can be based on forecasted demand or use static target /reorderlevel procedures. This is in general comparable to SAP F&R but this solution is more advanced, e.g. it can forecast promotional uplift, events etc.
You can get more information here
http://wiki.scn.sap.com/wiki/display/SCM/SAP+Forecasting+and+Replenishment
Hope this helps
Sylvia Ludwig
SAP Retail Solution Management