The tool requires a SAP Solution Manager with an enabled EEM application. This functionality is available starting from SMD 7.0 SP23.
The application works only when it is configured to connect to an Solution Manager System. Solution Manager provides a huge toolset to monitor handle your SAP landscape.
EEM is one of these tools and provides proactive monitoring of your applications.
For more details regarding EEM, take a look here:
http://wiki.sdn.sap.com/wiki/display/EEM/Home
For more details about this application:
https://sites.google.com/site/devtomsup/eem_viewer