Both business processes and business rules focus on creating a representation of the organization’s policies and practices. They are complementary modelling approaches as they address distinct aspects of organizational practices. The conceptual and pragmatic overlap between business process models and business rules indicates a need to model the two related aspects together. While researchers have argued that integrated modelling of business process models and business rules can improve the understanding of business processes, this proposition has neither been theoretically analysed nor empirically evaluated. Moreover, there are situations in which a business rule is better modelled independently of a business process model, but also situations in which it is more appropriate to integrate the rule with a business process model.