The distributed application model interface provides a flexible way to customize the Service Level Dashboard display to your needs. The Service Level Dashboard accepts a simple distributed application model as its configuration for application listings and transaction groupings. This model allows you to group Web applications or other monitors on the Service Level Dashboard into applications and regions. You can define how the health rolls up to the component group and the application as a whole...(read more)

Read the complete post at http://scug.be/blogs/scom/archive/2008/10/22/creating-the-distributed-application-models-to-drive-the-service-level-dashboard.aspx