Techniques for modelling workflows and their support of reuse

Several authors propose their own technique based on Petri Nets to model wo rkflow processes. Most of them recognise the adaptability problem inherent to workflows, viz. the frequently and/or radically changing character due t o changing business process rules, but suggest totally different solutions. Because the proposed techniques are fundamentally different, eleven of the se techniques are briefly discussed and compared. Next, we survey approache s to reuse in the workflow field and we classify them in a framework derive d from the information systems literature.