Process Choreography Modelling

A dedicated B2B process perspective has been the subject of significant development in the BPM field over recent years, seen notably through the BPMN 2.0 specification, which includes process choreography as one of its largest extensions. In the wider context of information systems analysis and design methodologies, the B2B perspective represents a crucial context through which requirements and iterative design of solutions are developed, as seen through numerous methods and techniques developed in the field across the last 40 years. To date, an understanding of how contemporary choreography proposals, typified by BPMN 2.0 process choreography, measure up to classical IS methodology capabilities, remains unaddressed. Consequently, a methodological understanding of how choreography could be used, from high-level analysis to detailed design, remains open. In this chapter, we address this gap. Based on an example taken from the supply chain management domain, we identify three important requirements for process choreography that make this wider perspective amenable to methodological systems analysis and design: functional scoping of different areas concerning a domain which can then be modelled and related to each other in isolation; stepwise refinement of choreography models, reminiscent of classical analysis techniques; and the introduction of conversation semantics expressing the intent of logically related message exchanges of choreographies. Accordingly, we propose extensions to choreography modelling and an improved analysis of requirements, such as breakdowns in negotiations that take place between collaborating partners, using concepts directly supported by, and illustrative extensions of BPMN 2.0 process choreography.