Modeling the Systems Used
*A system used during the execution of a step of a process represents what is necessary to realize this step. It can be an application or an IT service, or any other non IT resource, or more generally a functionality.
A System Used can be of several types:
An IT service,
*An IT service is a software component of an application, that can't be deployed alone and that realizes a sub-set of the functionalities of this application either for end users of this application or inside the application (or another application). This includes batch programs.
An application,
*An application is a software component that can be deployed and provides users with a set of functionalities.
A functionality,
*A technology capability is the ability to deliver a technology service which is required by a technology artifact or an application.
A resource.
*An asset is a means used to perform certain actions.