Process modeling is a decisive task for modern enterprises. The effectiveness of IS development largely depends on the quality of conceptual models and their understandability. However, process model quality is still a fuzzy concept and not fully understood yet. Recently, coupling became a concept for assessing model quality, but still there is a lack of research in transferring “coupling” to business process modeling. The field of software engineering has shown the importance of measuring coupling as a means for judging the quality of a design. Therefore, this paper collects a range of coupling metrics from the field of software engineering and transfers them to event driven process chains (EPC). Further the metrics are applied to different process models and implications for the process model quality are discussed.