JRS - Production and Staging?

I'm not sure I fully understand... Are you wondering if a deployment of JRS can attach to both a staging deployment of CLM DW and a production deployment DW of CLM?  If this is what you're asking - yes it can.  As a report manager you would navigate to the Data sources tab and manually add a new data source for either the production or staging DW (depending on where JRS is installed).  As long as you know the Data Warehouse password for the functional user you can do this.

Then during report creation you can select which Data source you want to create the report on - whether it be the Staging or Production DW.

Hope that helps,

-Steve