Visual suggestions for improvements in business process diagrams

Business processes are commonly modeled using a graphical modeling language. The most widespread notation for this purpose is business process diagrams in the Business Process Modeling Notation (BPMN). In this article, we use the visual query language BPMN-Q for expressing patterns that are related to possible problems in such business process diagrams. We discuss two classes of problems that can be found frequently in real-world models: sequence flow errors and model fragments that can make the model difficult to understand.By using a query processor, a business process modeler is able to identify possible errors in business process diagrams. Moreover, the erroneous parts of the business process diagram can be highlighted when an instance of an error pattern is found. This way, the modeler gets an easy-to-understand feedback in the visual modeling language he or she is familiar with. This is an advantage over current validation methods, which usually lack this kind of intuitive feedback.

► Business process models in languages like BPMN need to be correct.
► However, in practice, several classes of recurring problems can be found in such models.
► Current techniques for locating those problems do not describe the problem in an intuitive way.
► Our approach uses pattern-based search for problem patterns.
► The modeler gets a visual feedback on problems in the language he or she is familiar with.