1. A method implemented in a computer, comprising: storing a model of a business process in a computer-readable storage medium of the computer˜wherein the model comprises a set of model elements, and a plurality of associations, and each association of the plurality of associations is configured to define one or more relationships between a plurality of model elements from the set of model elements; and presenting, using a processor of the computer, a class-specific view point of the model to a user of a first class of users, wherein the class-specific view point exposes details of a first phase of a plurality of phases of a business process definition, the class-specific view point hides a detail of a second phase of the plurality of phases of the business process definition, the processor is coupled to the computer-readable storage medium and a display unit of the computer, the presenting comprises displaying the class-specific view point, tracing the set of model elements and the plurality of associations, and presenting the set of model elements and the plurality of associations, the presenting is based at least upon the user having membership in the first class of users such that the presenting is prevented for a second user of a second class of users, and the first class of users and the second class of users are involved in different phases of the business process definition.