You can deploy a XOM directly to a Rule Execution Server.
The XOM of each rule project on which you want to perform testing must be accessible to the SSP. You can deploy the XOM of a rule project directly to a Rule Execution Server using Managed XOM.
Alternatively, you can repackage the SSP with the XOM (see Making the XOM accessible by repackaging the SSP) if you want to persist the information in a DVS Project.
To make the XOM accessible to the SSP by deploying: