In the paper, we investigate principles for modeling flexible business processes enhanced by business rules. In our work, we start from a set of rule patterns, which are identified in the literature as a mean for increasing flexibility of business processes. The previous work on these patterns only considered the implementation level, but not the implications on the modeling level. Moreover, the potential for business process flexibility have not been fully leveraged due to some limitations in externalization of business logic into business rules. In this work, we report on the experience in modeling the set of rule patterns by using a rule-enhanced business process modeling language (rBPMN), and demonstrate the applicability of our findings on a business process case study.

1. Modeling Flexible Business Processes with Business Rule Patterns Milan Milanović 1 , Dragan Gašević 2 , Luis Rocha 2 1 University of Belgrade, Serbia 2 Athabasca University, AB, Canada https://semtech.athabascau.ca

9. rBPMN Example

10. rBPMN Example

11. http://code.google.com/p/rbpmneditor/

12. rBPMN Editor

13. http://code.google.com/p/rbpmneditor/wiki/Patterns

20. Book Store Case Study

21. Case Study – Book Store

22. Case Study – Book Store Constraints at predefined checkpoint

23. Case Study – Book Store Decision point abstraction pattern

24. Case Study – Book Store

26. Case Study – Book Store

27. Case Study – Book Store Decision node to business rule binding

28. Case Study – Book Store

29. Case Study – Book Store Sub-process selection

30. Comparison Pattern group Pattern name Original rBPMN DR IR PrR DR IR PR RR Control flow decisions Decision logic abstraction + + + Decision node to business rule binding + + + Decision with flexible input data + + + Decision flexible output + + + Data constraints Constraints at predefined checkpoint + + Constraints at multiple checkpoints + + Constraints enforced by external data context + + + Dynamic BP composition Business rule-based subprocess selection + + Business rule-based process composition + + + +

33. Thank you! Questions? https://semtech.athabascau.ca