1.2 The Deployment Model
A Deployment Tool Application in combination with the first Version created within the Application defines the core of your software product and becomes the building block for subsequent Versions and Patches in the Application.
The software product definition is contained in the Version and Patch details when the Version or Patch is built, and the resulting MSI file (Version) or MSP file (Patch) is deployed.
Also see
1.2.5 What do you need to deploy?