30 TH INTERNATIONAL CONFERENCE ON INFORMATION SYSTEMS DEVELOPMENT (ISD2022 CLUJ-NAPOCA, ROMANIA) Modelling Inter-Organizational Business Processes Governance Vítor Hugo Machado Ribeiro University of Coimbra, CISUC, DEI Coimbra, Portugal vhribeiro@dei.uc.pt João Barata University of Coimbra, CISUC, DEI Coimbra, Portugal barata@dei.uc.pt Paulo Rupino da Cunha University of Coimbra, CISUC, DEI Coimbra, Portugal rupino@dei.uc.pt Abstract Digital transformation requires decentralizing business process governance due to the increasing interdependencies of organizations and more complex business pipelines enabled by information technologies. We present a modelling approach to assist companies in their inter-organizational business process governance (IO-BPG). The results emerge from a design science research conducted with a major European telecommunications service provider. They include (1) the key domain attributes, (2) a domain-specific ontology, and (3) a BPMN extension instantiated in IO-BPG scenarios of Software-as-a- Service, covering structure, processes, and relational mechanisms. For theory, this paper extends the literature on business process governance with a modelling approach evaluated in one of the most regulated and dynamic economic sectors. For practice, our proposal may help appraise accountability, confidentiality, compliance, autonomy, authority, traceability, and collaboration configurations that are crucial to IO-BPG. Keywords: Inter-Organizational Business Process Governance, BPMN, BPMN Extension, IT Governance 1. Introduction Business Process Management (BPM) is moving beyond organizational boundaries. Digital transformation requiring integrative capabilities [41] determines this shift from internal operations to inter-organizational business processes (IOBP) [8]. Therefore, new mechanisms are necessary to govern business processes in collaborative networks [23]. However, the structural, procedural, and relational mechanisms proposed by the most prominent governance frameworks (e.g., COBIT) are traditionally applied to a single organization [21] and are not sufficiently integrated with business process models. Business process governance can be defined as the “process of process management” [36], sharing its roots and foundational mechanisms with the IT Governance literature. Moreover, many tools exist to support the governance facets of process mining, monitoring, and control [23]. Nevertheless, business processes are getting increasingly agile and fragmented across organizations, becoming harder to model and steer using standard languages, such as the Business Process Modelling and Notation (BPMN) [24]. This challenge of “digital transformation of business process governance” [23] is the main focus of our paper. Our design science research (DSR) project started in cooperation with a relevant European telecommunications service provider (TSP). The company operates in a multinational environment, in a highly regulated sector, and runs complex organizational software development and operations pipelines (e.g., DataMLOps, DevSecOps, CloudOps) in cross-functional teams. Their product portfolio is also changing to innovative Software-as-a-Service (SaaS) that combines (1) cloud storage, (2) artificial intelligence