Abstract
Current approaches to the representation of business processes can be divided into two major categories, referred to as activity-centric and artifact-centric. The former underline the tasks as the basic units of work, and the latter stress the importance of the life cycles of the artifacts (i.e., the business entities). This paper analyzes the major issues that characterize the artifact-centric approach, i.e., structure, dynamics and coordination. These issues can be dealt with in various ways, ranging from separate models to holistic ones. The pros and cons of separate models and compact ones are analyzed on the basis of how they cope with three relevant aspects, i.e., aggregation, synchronization and matching. A number of motivating examples are presented along with the notation used to define them. This notation, named ARTS (ARtifacts and TAsks), considers both artifacts and tasks as first-class citizens of business process models.
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