14. A composite application modeling system comprising at least one memory storing a composite application modeling tool and at least one processor executing the application modeling tool to perform operations, the operations comprising displaying, in a first view, a composite catalog illustrating composite integration scenarios, each of the composite integration scenarios characterizing software implementing a respective and distinct business scenario; displaying, in a second view, a composite integration scenario illustrating a user-centric component and one or more process components, where a process component characterizes software implementing a respective and distinct process and belongs to exactly one deployment unit, each deployment unit characterizing independently operable software deployable on a separate computer hardware platform; displaying, in a third view, a process step model corresponding to the user-centric component, the process step model illustrating one or more process steps in a business scenario; and receiving a user-initiated selection of a first graphical user interface associated with a single composite integration scenario in the first view, and wherein the second view is displayed in response to the selection of the first graphical user interface element.
14. A composite application modeling system comprising at least one memory storing a composite application modeling tool and at least one processor executing the application modeling tool to perform operations, the operations comprising displaying, in a first view, a composite catalog illustrating composite integration scenarios, each of the composite integration scenarios characterizing software implementing a respective and distinct business scenario; displaying, in a second view, a composite integration scenario illustrating a user-centric component and one or more process components, where a process component characterizes software implementing a respective and distinct process and belongs to exactly one deployment unit, each deployment unit characterizing independently operable software deployable on a separate computer hardware platform; displaying, in a third view, a process step model corresponding to the user-centric component, the process step model illustrating one or more process steps in a business scenario; and receiving a user-initiated selection of a first graphical user interface associated with a single composite integration scenario in the first view, and wherein the second view is displayed in response to the selection of the first graphical user interface element. 18. The system of claim 14 , the operations further comprising: receiving a user-initiated selection of a third graphical user interface associated with a process component in the second view, and wherein the fourth view is displayed in response to the selection of the third graphical user interface element.