From engagement to alignment : exploring enterprise architecture through the lens of design science

Information Systems Design Science (ISDS) as a research community is limited by a small number of research frameworks with considerable influence. The small triad of influential ISDS research, consisting of Walls, et al (1992), March and Smith (1995), and Hevner et al (2004) have primarily limited ISDS research to the positivist paradigm and the IT artifact. In contrast, Herbert Simon’s intentions for design science never had such restrictions and intended a broader perspective. This dissertation explores Simon’s intentions for design science, the Simonian stream of thought that includes The Sciences of the Artificial, as well as much of his most notable research, and offers an ‘informed view’ of design science in the tradition of Rortyian neopragmatism. Using this new lens of design science, a Bhaskarian critical realist treatment of human artifacts is also developed. Collectively, a Rortyian neopragmatist treatment for design science, and a Bhaskarian critical realist treatment of human artifacts are used as a lens to augment the Walls et al (1992) framework for Information Systems Design Theories (ISDT). An example of how to apply this lens is accomplished in Paper 2 of the dissertation. The ISDS lens is applied to the topic of Enterprise Architecture (EA). EA as vehicle for IS Alignment is well defined in terms of frameworks, artifacts, and methodology. However little is understood with respect to the discipline and practice of EA. Seeking to advance our understanding of effective vehicles for IS alignment, this research examines EA as an alignment practice and how it attempts to realize alignment. Specifically, we address the following question: How does EA manifest itself in organizations? This research employs an interpretivist epistemology in a manner quite distinct from ISDS research and thus provides contributions to academia in terms of methodology and insight on EA, and for practitioners who wish to mature an EA practice in their organization. Some of the main concepts discovered in the empirical study in Paper 2 are used to develop a practitioner-oriented framework for EA practice in Paper 3

Coordinating Large Distributed Relational Process Structures

Representing a business process as a collaboration of interacting processes has become feasible with the emergence of data-centric business process management paradigms. Usually, these interacting processes have relations and, thereby, form a complex relational process structure. The interactions of processes within this relational process structure need to be coordinated to arrive at a meaningful overall business goal. However, relational process structures may become arbitrarily large. With the use of cloud technology, they may additionally be distributed over multiple nodes, allowing for scalability. Coordination processes have been proposed to coordinate relational process structures, where processes may have one-to-many and many-to-many relations at run-time. This paper shows how multiple coordination processes can be used in a decentralized fashion to more efficiently coordinate large, distributed process structures. The main challenge of using multiple coordination processes is to effectively realize the coordination responsibility of each coordination process. Key components of the solution are the subsidiary principle and the hierarchy of the relational process structure. Finally, an implementation of the coordination process concept based on microservices was developed, which allows for fast and concurrent enactment of multiple, decentralized coordination processes in large, distributed process structures

Linking data and BPMN processes to achieve executable models

We describe a formally well founded approach to link data and processes conceptually, based on adopting UML class diagrams to represent data, and BPMN to represent the process. The UML class diagram together with a set of additional process variables, called Artifact, form the information model of the process. All activities of the BPMN process refer to such an information model by means of OCL operation contracts. We show that the resulting semantics while abstract is fully executable. We also provide an implementation of the executor.Peer ReviewedPostprint (author's final draft

Business Grid Services

Grid services have come to represent the synthesis of web services and grid computing paradigms. Web services provide the means to modularize software, enabling loosely coupled and novel synthesis. Grid computing removes the binding between functional software components and specific hosting hardware, enabling software to be deployed dynamically over a network (e.g. intra-, extra- or inter-net). Applying the constructs of grid computing to the service orientation of enterprise software will allow business service networks to utilize more specialized services. An upper service ontology that enables business grid services to be described and then related to the grid hosting platform is presented. Explicit knowledge is required for enterprise software, hosting servers and the domain that can then be utilized by both SLA and reservation systems. The ontology presented is derived from and validated using a collection of web services taken from leading investment banks